void setup() {
  // put your setup code here, to run once:
pinMode(3, OUTPUT);
pinMode(5, INPUT);
pinMode(6, INPUT);
pinMode(7, INPUT);
pinMode(8, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if (digitalRead(5)==HIGH){
analogWrite(3,64);
}if (digitalRead(6)==HIGH){
analogWrite(3,127);
}if (digitalRead(7)==HIGH){
analogWrite(3,191);
}if (digitalRead(8)==HIGH){
analogWrite(3,225);
}
}