added a cat

toothbrush-timer.ino

@@ -32,7 +32,45 @@ void drawStar(int x, int y) {
 }
 
 // ------------------------------------------------------------
-// Celebration animation with glow + sparkles
+// Draw a cat face (fits same 28px circle as smiley)
+// ------------------------------------------------------------
+void drawCatFace(int cx, int cy) {
+  // Head outline
+  display.drawCircle(cx, cy, 14, SSD1306_WHITE);
+
+  // Ears
+  display.drawLine(cx - 10, cy - 8, cx - 4, cy - 16, SSD1306_WHITE);
+  display.drawLine(cx - 4, cy - 16, cx - 2, cy - 8, SSD1306_WHITE);
+
+  display.drawLine(cx + 10, cy - 8, cx + 4, cy - 16, SSD1306_WHITE);
+  display.drawLine(cx + 4, cy - 16, cx + 2, cy - 8, SSD1306_WHITE);
+
+  // Eyes
+  display.fillCircle(cx - 6, cy - 3, 2, SSD1306_WHITE);
+  display.fillCircle(cx + 6, cy - 3, 2, SSD1306_WHITE);
+
+  // Nose
+  display.drawPixel(cx, cy + 1, SSD1306_WHITE);
+  display.drawPixel(cx - 1, cy + 2, SSD1306_WHITE);
+  display.drawPixel(cx + 1, cy + 2, SSD1306_WHITE);
+
+  // Mouth
+  display.drawPixel(cx - 2, cy + 4, SSD1306_WHITE);
+  display.drawPixel(cx - 3, cy + 5, SSD1306_WHITE);
+
+  display.drawPixel(cx + 2, cy + 4, SSD1306_WHITE);
+  display.drawPixel(cx + 3, cy + 5, SSD1306_WHITE);
+
+  // Whiskers
+  display.drawLine(cx - 6, cy + 2, cx - 14, cy + 1, SSD1306_WHITE);
+  display.drawLine(cx - 6, cy + 4, cx - 14, cy + 5, SSD1306_WHITE);
+
+  display.drawLine(cx + 6, cy + 2, cx + 14, cy + 1, SSD1306_WHITE);
+  display.drawLine(cx + 6, cy + 4, cx + 14, cy + 5, SSD1306_WHITE);
+}
+
+// ------------------------------------------------------------
+// Celebration animation with glow + sparkles (Smiley)
 // ------------------------------------------------------------
 void showSmiley() {
   int cx = 64;
@@ -40,13 +78,12 @@ void showSmiley() {
 
   unsigned long startTime = millis();
 
-  // --- 1. Sparkle burst at the start ---
+  // --- Sparkle burst ---
   for (int burst = 0; burst < 12; burst++) {
     display.clearDisplay();
 
     int sx, sy, dx, dy, dist;
 
-    // Keep sparkles OUTSIDE the face radius
     do {
       sx = random(0, 128);
       sy = random(0, 32);
@@ -63,25 +100,21 @@ void showSmiley() {
     delay(60);
   }
 
-  // --- 2. Main 15-second animation ---
+  // --- Main animation ---
   while (millis() - startTime < 15000) {
     display.clearDisplay();
 
-    // Pulsing glow radius
     float t = (millis() - startTime) * 0.008;
     int pulse = 2 + (sin(t) * 3);
 
-    // Glow ring
     display.drawCircle(cx, cy, 14 + pulse, SSD1306_WHITE);
-
-    // Face outline
     display.drawCircle(cx, cy, 14, SSD1306_WHITE);
 
     // Eyes
     display.fillCircle(cx - 6, cy - 4, 2, SSD1306_WHITE);
     display.fillCircle(cx + 6, cy - 4, 2, SSD1306_WHITE);
 
-    // Smile (correct orientation)
+    // Smile
     for (int angle = 20; angle <= 160; angle += 5) {
       float rad = angle * 0.0174533;
       int x = cx + cos(rad) * 10;
@@ -89,7 +122,7 @@ void showSmiley() {
       display.drawPixel(x, y, SSD1306_WHITE);
     }
 
-    // --- Twinkling sparkles (outside the face) ---
+    // Sparkles
     for (int i = 0; i < 5; i++) {
       int sx, sy, dx, dy, dist;
 
@@ -101,7 +134,75 @@ void showSmiley() {
         dy = sy - cy;
         dist = sqrt(dx * dx + dy * dy);
 
-      } while (dist < 22);  // keep sparkles OUTSIDE the face + glow
+      } while (dist < 22);
+
+      drawStar(sx, sy);
+    }
+
+    display.display();
+    delay(120);
+  }
+
+  display.clearDisplay();
+  display.display();
+  display.ssd1306_command(SSD1306_DISPLAYOFF);
+}
+
+// ------------------------------------------------------------
+// Celebration animation with glow + sparkles (Cat)
+// ------------------------------------------------------------
+void showCat() {
+  int cx = 64;
+  int cy = 16;
+
+  unsigned long startTime = millis();
+
+  // --- Sparkle burst ---
+  for (int burst = 0; burst < 12; burst++) {
+    display.clearDisplay();
+
+    int sx, sy, dx, dy, dist;
+
+    do {
+      sx = random(0, 128);
+      sy = random(0, 32);
+
+      dx = sx - cx;
+      dy = sy - cy;
+      dist = sqrt(dx * dx + dy * dy);
+
+    } while (dist < 22);
+
+    drawStar(sx, sy);
+
+    display.display();
+    delay(60);
+  }
+
+  // --- Main animation ---
+  while (millis() - startTime < 15000) {
+    display.clearDisplay();
+
+    float t = (millis() - startTime) * 0.008;
+    int pulse = 2 + (sin(t) * 3);
+
+    display.drawCircle(cx, cy, 14 + pulse, SSD1306_WHITE);
+
+    drawCatFace(cx, cy);
+
+    // Sparkles
+    for (int i = 0; i < 5; i++) {
+      int sx, sy, dx, dy, dist;
+
+      do {
+        sx = random(0, 128);
+        sy = random(0, 32);
+
+        dx = sx - cx;
+        dy = sy - cy;
+        dist = sqrt(dx * dx + dy * dy);
+
+      } while (dist < 22);
 
       drawStar(sx, sy);
     }
@@ -110,7 +211,6 @@ void showSmiley() {
     delay(120);
   }
 
-  // Turn off the display after animation
   display.clearDisplay();
   display.display();
   display.ssd1306_command(SSD1306_DISPLAYOFF);
@@ -122,17 +222,13 @@ void showSmiley() {
 void drawTimer() {
   display.clearDisplay();
 
-  // Bar dimensions
   int barHeight = 32;
   int barWidth = 96;
 
-  // Map remaining seconds to bar width
   int currentWidth = map(remaining, 0, 90, 0, barWidth);
 
-  // Draw bar left → right
   display.fillRect(0, 0, currentWidth, barHeight, SSD1306_WHITE);
 
-  // Digits on the right
   display.setTextSize(2);
   display.setTextColor(SSD1306_WHITE);
 
@@ -154,46 +250,48 @@ void setup() {
 
   display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
   display.clearDisplay();
-  display.setRotation(0);  // horizontal
+  display.setRotation(0);
   display.display();
+
+  randomSeed(analogRead(A0));  // for random celebration
 }
 
 // ------------------------------------------------------------
 // Main loop
 // ------------------------------------------------------------
 void loop() { 
-  // Start timer on button press
   if (!running && digitalRead(buttonPin) == LOW) {
     remaining = 90;
     running = true;
     display.ssd1306_command(SSD1306_DISPLAYON);
-    
-    delay(200); // debounce
+    delay(200);
   }
 
   if (running) {
     unsigned long now = millis();
 
-    // Update once per second
     if (now - lastUpdate >= 1000) {
       lastUpdate = now;
       remaining--;
 
-      // Final 5-second countdown beeps (higher pitch)
       if (remaining > 0 && remaining <= 5) {
-        tone(buzzerPin, 3000, 150);   // 3 kHz beep
+        tone(buzzerPin, 3000, 150);
       }
-      // Regular 10-second interval beeps
       else if (remaining > 0 && remaining % 10 == 0) {
-        tone(buzzerPin, 2000, 150);   // 2 kHz beep
+        tone(buzzerPin, 2000, 150);
       }
 
       if (remaining <= 0) {
         running = false;
-        showSmiley();
+
+        // Random celebration
+        if (random(0, 2) == 0)
+          showSmiley();
+        else
+          showCat();
       }
     }
 
     drawTimer();
   }
-}
+}