const int R=11;
const int G=10;
const int B=9;
int renk;
int gecikme=1000;

 void setup(){
  pinMode(R ,OUTPUT);
  pinMode(G ,OUTPUT);
  pinMode(B ,OUTPUT);
  Serial.begin(9600);
 }
 void loop(){5
 renk=random(4);
  Serial.println(4);
   switch(renk){
   case 0:
  digitalWrite(R ,HIGH);
  digitalWrite(G ,LOW);
  digitalWrite(B ,LOW);
  delay(1000);
  case 1:
  digitalWrite(R ,LOW);
  digitalWrite(G ,LOW);
  digitalWrite(B ,HIGH);
  delay(1000);
  case 2:
  digitalWrite(R ,LOW);
  digitalWrite(G ,HIGH);
  digitalWrite(B ,LOW);
  delay(1000);
  case 3:
  digitalWrite(R ,HIGH);
  digitalWrite(G ,HIGH);
  digitalWrite(B ,HIGH);
  delay(1000);
  case 4:
  digitalWrite(R ,HIGH);
  digitalWrite(G ,LOW);
  digitalWrite(B ,HIGH);
  delay(1000);
  case 5:
  digitalWrite(R ,HIGH);
  digitalWrite(G ,HIGH);
  digitalWrite(B ,LOW);
  delay(1000);
  case 6:
  digitalWrite(R ,LOW);
  digitalWrite(G ,HIGH);
  digitalWrite(B ,HIGH);
  delay(1000);
  



  
  }
 }