void setup() {
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(4, INPUT);
pinMode(A0, INPUT);
}

void loop() {
int a = analogRead(A0);
int c = map(a,0,1023,0,255);
while(digitalRead(4)==HIGH)
{analogWrite(10,c);
delay(50);
analogWrite(9,c);
delay(50);
analogWrite(6,c);
delay(50);
analogWrite(5,c);
delay(50);
analogWrite(3,c);
delay(50);
analogWrite(10,LOW);
delay(50);
analogWrite(9,LOW);
delay(50);
analogWrite(6,LOW);
delay(50);
analogWrite(5,LOW);
delay(50);
analogWrite(3,LOW);
delay(50);
}
}