int button1=13;
int button2=12;
int R=11;
int G=10;
int B=9;
int Y=8;


void setup() {
pinMode(button1, INPUT);
pinMode(button2, INPUT);
pinMode(R, OUTPUT);
pinMode(G, OUTPUT);
pinMode(B, OUTPUT);
pinMode(Y, OUTPUT);
digitalWrite(Y, LOW);
digitalWrite(B, LOW);
digitalWrite(G, LOW);
digitalWrite(R, LOW);
}

void loop() {
while (digitalRead(button1)) {
for(int i=0; i<10; i++) {
digitalWrite(R, HIGH);
delay(250);
digitalWrite(R, LOW);
digitalWrite(G, HIGH);
delay(250);
digitalWrite(R, LOW);
digitalWrite(G, LOW);
digitalWrite(B, HIGH);
delay(250);
digitalWrite(R, LOW);
digitalWrite(G, LOW);
digitalWrite(B, LOW);
digitalWrite(Y, HIGH);
delay(250);
digitalWrite(R, LOW);
digitalWrite(G, LOW);
digitalWrite(B, LOW);
digitalWrite(Y, LOW);
}
}

while (digitalRead(button2)) {
for(int i=0; i<10; i++) {
digitalWrite(Y, HIGH);
delay(250);
digitalWrite(Y, LOW);
digitalWrite(B, HIGH);
delay(250);
digitalWrite(Y, LOW);
digitalWrite(B, LOW);
digitalWrite(G, HIGH);
delay(250);
digitalWrite(Y, LOW);
digitalWrite(B, LOW);
digitalWrite(G, LOW);
digitalWrite(R, HIGH);
delay(250);
digitalWrite(Y, LOW);
digitalWrite(B, LOW);
digitalWrite(G, LOW);
digitalWrite(R, LOW);
}
}
}