#define ledmerah 2
#define ledkuning 4
#define ledhijau 7

void setup() {
  // put your setup code here, to run once:
  pinMode (ledmerah, OUTPUT) ;
  pinMode (ledkuning, OUTPUT) ;
  pinMode (ledhijau, OUTPUT) ;

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite (ledmerah , HIGH  ) ;
  digitalWrite (ledkuning , HIGH ) ;
  digitalWrite (ledhijau, HIGH  ) ;
  delay (300);

  digitalWrite (ledmerah , LOW  ) ;
  digitalWrite (ledkuning , LOW  ) ;
  digitalWrite (ledhijau, LOW  ) ;
  delay (300);
  

}