diff --git a/src/main.zig b/src/main.zig
index 6b4f926..533c4b9 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -110,6 +110,32 @@ pub fn main() !void {
                     c.SDL_Log("Unable to draw point: %d", draw_result);
                     return error.SDLDrawingFailed;
                 }
+            } else {
+                const red_color_result = c.SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+                if (red_color_result != 0) {
+                    c.SDL_Log("Unable to set draw color: %d", red_color_result);
+                    return error.SDLInitializationFailed;
+                }
+
+                const draw_result = c.SDL_RenderDrawPoint(renderer, (column + 1) * column_width - 1, y);
+                if (draw_result != 0) {
+                    c.SDL_Log("Unable to draw point: %d", draw_result);
+                    return error.SDLDrawingFailed;
+                }
+
+                if (!color) {
+                    const white_color_result = c.SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+                    if (white_color_result != 0) {
+                        c.SDL_Log("Unable to set draw color: %d", white_color_result);
+                        return error.SDLInitializationFailed;
+                    }
+                } else {
+                    const black_color_result = c.SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+                    if (black_color_result != 0) {
+                        c.SDL_Log("Unable to set draw color: %d", black_color_result);
+                        return error.SDLInitializationFailed;
+                    }
+                }
             }
 
             x += 1;