int relay_1=8; int relay_2=9; int motion_sensor=10; void setup() { pinMode(relay_1,OUTPUT); pinMode(relay_2,OUTPUT); pinMode(motion_sensor,INPUT); } void loop() { int val; val=digitalRead(motion_sensor); if(val==1) { digitalWrite(relay_1,LOW); //delay(1000); digitalWrite(relay_2,HIGH); //delay(1000); } else { digitalWrite(relay_1,HIGH); digitalWrite(relay_2,LOW); } }