// Simple Light Show
// Author: S.2C(9) Kan Tsz Ching
// Date: 2023-3-11

void setup() {
   pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
}

void loop() {
  // State 1
  // LED: ON, OFF, ON, OFF
  // Duration: 1.5s
  digitalWrite(7, HIGH)
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
  delay(1500);

  // State 2
  // LED: OFF, ON, OFF, ON
  // Duration: 1.5s
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
  delay(1000);

  // State 3
  // LED: ON, ON, ON, ON
  // Duration: 1s
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, HIGH);
  delay(2000);

  // State 4
  // LED: OFF, OFF, OFF, OFF
  // Duration: 1s
} digitalWrite(7, LOW);
  digitalWrite(8, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  delay(2000);