Arduino Traffic Light - Autodesk Tinkercad

IMTx: DMx102
Arduino Programming, from novice to ninja
Lab 1 (auto-graded)
1. All the pins have to be set as OUTPUT at the beginning of the sketch
2. The green LED (on pin 4) is switched on for 3 seconds (green LED will be the first to light up) then it is switched off
3. When the green LED is switched off, orange LED is switched on for 1 second then it is switched off again
4. When the orange LED is switched off, red LED is switched on for 3 seconds then it is switched off again
5. These instructions must run again and again in the loop()!
Here is the source code:
"
void setup()
{
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
}
void loop()
{
digitalWrite(4, HIGH); // For green LED
delay(3000); // Wait for 3 second
digitalWrite(4, LOW);
digitalWrite(3, HIGH); // For orange LED
delay(1000); // Wait for 1 second
digitalWrite(3, LOW);

digitalWrite(2, HIGH); // For the red LED
delay(3000); // Wait for 3 second
digitalWrite(2, LOW);
}
"
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