void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(21,OUTPUT);
  pinMode(22,OUTPUT);
  pinMode(23,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  analogWrite(21,analogRead(25));
  analogWrite(22,analogRead(26));
  analogWrite(23,analogRead(27));
  delay(1000);// this speeds up the simulation
}