light control unit code problems

Using Arduino Project Guidance
6

Use the compiler and my comments above to help you make corrections.

This compiles.

#define A_light 13 // Light A on pin 13
void setup() 
{
  pinMode(A_light, OUTPUT);
}

void loop ()
{
  digitalWrite(A_light, HIGH); //turn A light on
  delay(900000UL); // wait for 15 mins
  digitalWrite(A_light, LOW); // turn A light off
  delay(1000UL);  // turn all off for 1 second
}