Loops
int green_LED = 8; int yellow_LED = 12; void setup() { pinMode ( green_LED, OUTPUT); pinMode ( yellow_LED, OUTPUT); } void loop() { for (int i = 0; i < 4; i++) { digitalWrite(green_LED, HIGH); delay(500); digitalWrite(green_LED, LOW); delay(500); } int j = 0; while (j < 3) { digitalWrite(yellow_LED, HIGH); delay(500); digitalWrite(yellow_LED, LOW); delay(500); j++; } }