void setup() {
  // put your setup code here, to run once:
pinMode (4, OUTPUT); //PUMP RELAY ON/OFF
pinMode (2, OUTPUT); //CONVEYOR RELAY FORWARD
pinMode (0, OUTPUT); //CONVEYOR RELAY REVERSE
pinMode (3, INPUT); //START BUTTON
pinMode (5, INPUT); //Lower Limit Switch
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1); // this speeds up the simulation
int a = digitalRead(3); //Power Button Press
int b = digitalRead(5) ; //Lower Limit Switch 

   if (a == HIGH && b == LOW); //Power button pressed and lower limit switch open {
      digitalWrite(2, HIGH); //CONVEYOR FORWARD ON;
   } else {
      digitalWrite(2, LOW); //CONVEYOR FORWARD OFF;
   }
  digitalWrite(4, HIGH); //PUMP RELAY ON
}