#define port A2
#define blue 5
#define green 6
#define yellow 7
void setup() {
 pinMode(blue,INPUT);
 pinMode(green,OUTPUT);
 pinMode(yellow, OUTPUT);

}

void loop() {
 int value=analogRead(port);
 int tree=map(value,o,1023,0,255);
 if(tree<=100)
{
  digitalWrite(blue,HIGH);
  digitalWrite(green,low);
}
else if(tree<=200)
{
  digitalWrite(blue,LOW);
  digitalWrite(green,HIGH);
}
else{
   digitalWrite(green,LOW);
  digitalWrite(yellow,HIGH);
}