int green=17;     // connect 220 ohm resistor with LEDs 
int yellow=4;
int red=2;


void setup()
{
 pinMode(green, OUTPUT);
 pinMode(yellow, OUTPUT);
 pinMode(red, OUTPUT);
}


void loop()
{
   //9 detikk
 {
 digitalWrite(green,0);
 digitalWrite(yellow,0);
 digitalWrite(red,1);
 delay(9000);
 }
  //4  detikk
 { 
 digitalWrite(green,0);
 digitalWrite(yellow,1);
 digitalWrite(red,0);
 delay(4000);

}
{
  // 9 detikk
 digitalWrite(green,1);
 digitalWrite(yellow,0);
 digitalWrite(red,0);
 delay(9000);
 }
}