int led1 = 5;
int led2 = 6;
int led3 = 7;

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}
void loop() {
  int var = analogRead(A0);
  int varmap = map(var,0,1023,0,255);
Serial.println(varmap);
if(varmap < 80){
  analogWrite(led1,255);
  analogWrite(led2,0);
  analogWrite(led3,0);
  delay(100);
}
else if(varmap < 160 ){
  analogWrite(led1,255);
  analogWrite(led2,255);
  analogWrite(led3,0);
  delay(100);
}
else{
  analogWrite(led1,255);
  analogWrite(led2,255);
  analogWrite(led3,255);
  delay(100);
}
}