diff --git a/Makefile b/Makefile
index ce0296a..c532fea 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,8 @@ endif
 
 OBJDIR = objects
 
+HEADERS = src/screen.h
+
 SOURCES = src/main.cc \
 		src/screen.cc
 
@@ -16,7 +18,7 @@ all: dvorak_typing_practice
 dvorak_typing_practice: ${OBJECTS}
 	${CXX} ${CXX_FLAGS} -o dvorak_typing_practice $^ -lraylib
 
-${OBJDIR}/%.o: %.cc
+${OBJDIR}/%.o: %.cc ${HEADERS}
 	@mkdir -p $$(dirname $@)
 	${CXX} ${CXX_FLAGS} -c -o $@ $<
 
diff --git a/src/main.cc b/src/main.cc
index ba93dde..f01f282 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -55,7 +55,7 @@ int main(int argc, char **argv) {
                     EndDrawing();
                 }
             }
-        } while (!std::cin.eof() && !WindowShouldClose());
+        } while (!ifs.eof() && !WindowShouldClose());
     }
 
     CloseWindow();
diff --git a/src/screen.cc b/src/screen.cc
index 15832bb..27d2781 100644
--- a/src/screen.cc
+++ b/src/screen.cc
@@ -60,7 +60,7 @@ void Screen::draw() {
 
     int offset = 0;
     if (!prev.empty()) {
-        DrawText(prev.c_str(), LEFT_OFFSET + offset, TOP_OFFSET, FONT_SIZE, Color{127, 127, 127, 255});
+        DrawText(prev.c_str(), LEFT_OFFSET + offset, TOP_OFFSET, FONT_SIZE, GRAY);
         offset += MeasureText(prev.c_str(), FONT_SIZE) + PREV_OFFSET;
     }
 
@@ -75,4 +75,201 @@ void Screen::draw() {
     if (!word_post.empty()) {
         DrawText(word_post.c_str(), LEFT_OFFSET + offset, TOP_OFFSET, FONT_SIZE, WHITE);
     }
+
+    draw_overlay(word_center[0]);
+}
+
+void Screen::draw_overlay(char c) {
+    switch (c) {
+    case '`':
+    case '~':
+        DrawCircle(1 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '1':
+    case '!':
+        DrawCircle(61 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '2':
+    case '@':
+        DrawCircle(121 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '3':
+    case '#':
+        DrawCircle(181 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '4':
+    case '$':
+        DrawCircle(241 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '5':
+    case '%':
+        DrawCircle(301 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '6':
+    case '^':
+        DrawCircle(361 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '7':
+    case '&':
+        DrawCircle(421 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '8':
+    case '*':
+        DrawCircle(481 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '9':
+    case '(':
+        DrawCircle(541 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '0':
+    case ')':
+        DrawCircle(601 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '{':
+    case '[':
+        DrawCircle(661 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '}':
+    case ']':
+        DrawCircle(721 + KEY_HALF_SIZE, 1 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '\'':
+    case '"':
+        DrawCircle(91 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '<':
+    case ',':
+        DrawCircle(151 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '>':
+    case '.':
+        DrawCircle(211 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'P':
+    case 'p':
+        DrawCircle(271 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'Y':
+    case 'y':
+        DrawCircle(331 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'F':
+    case 'f':
+        DrawCircle(391 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'G':
+    case 'g':
+        DrawCircle(451 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'C':
+    case 'c':
+        DrawCircle(511 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'R':
+    case 'r':
+        DrawCircle(571 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'L':
+    case 'l':
+        DrawCircle(631 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '?':
+    case '/':
+        DrawCircle(691 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '+':
+    case '=':
+        DrawCircle(751 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '|':
+    case '\\':
+        DrawCircle(811 + KEY_HALF_SIZE, 61 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'A':
+    case 'a':
+        DrawCircle(106 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'O':
+    case 'o':
+        DrawCircle(166 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'E':
+    case 'e':
+        DrawCircle(226 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'U':
+    case 'u':
+        DrawCircle(286 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'I':
+    case 'i':
+        DrawCircle(346 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'D':
+    case 'd':
+        DrawCircle(406 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'H':
+    case 'h':
+        DrawCircle(466 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'T':
+    case 't':
+        DrawCircle(526 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'N':
+    case 'n':
+        DrawCircle(586 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'S':
+    case 's':
+        DrawCircle(646 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case '_':
+    case '-':
+        DrawCircle(706 + KEY_HALF_SIZE, 121 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case ':':
+    case ';':
+        DrawCircle(136 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'Q':
+    case 'q':
+        DrawCircle(196 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'J':
+    case 'j':
+        DrawCircle(256 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'K':
+    case 'k':
+        DrawCircle(316 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'X':
+    case 'x':
+        DrawCircle(376 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'B':
+    case 'b':
+        DrawCircle(436 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'M':
+    case 'm':
+        DrawCircle(496 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'W':
+    case 'w':
+        DrawCircle(556 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'V':
+    case 'v':
+        DrawCircle(616 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    case 'Z':
+    case 'z':
+        DrawCircle(676 + KEY_HALF_SIZE, 181 + KEY_HALF_SIZE, KEY_HALF_SIZE, KEY_HIGHLIGHT_COLOR);
+        break;
+    default:
+        break;
+    }
 }
diff --git a/src/screen.h b/src/screen.h
index 13164f1..b1b052d 100644
--- a/src/screen.h
+++ b/src/screen.h
@@ -16,6 +16,9 @@ constexpr int FONT_SIZE = 40;
 constexpr int CENTER_X_OFFSET = FONT_SIZE / 2;
 constexpr int PREV_OFFSET = FONT_SIZE * 2;
 
+constexpr int KEY_HALF_SIZE = 29;
+constexpr Color KEY_HIGHLIGHT_COLOR = Color{255, 255, 0, 127};
+
 class Screen {
 public:
     Screen();
@@ -40,6 +43,8 @@ private:
      */
     std::bitset<32> flags;
 
+    void draw_overlay(char c);
+
 };
 
 #endif