DIY Small Linear Stage

/*
DIY small stage test
 
   * Press the button(PBS1) connected to Arduino pin8 to run a stage foward.
   * Press the button(PBS2) connected to Arduino pin9 to run a stage reverse.
   
*/

#define PBS1 8
#define PBS2 9
#define MOTOR1 2
#define MOTOR2 3
int s1=0,s2=0;

void setup() {
  pinMode(PBS1, INPUT);
  pinMode(PBS2, INPUT);
  pinMode(MOTOR1 , OUTPUT);
  pinMode(MOTOR2, OUTPUT);
}

void loop() {
   s1=digitalRead(PBS1);
   if(s1==0) {						// While button is pressed...
    digitalWrite(MOTOR1, LOW);		//Motor direction:CW
    digitalWrite(MOTOR2, HIGH);		//Motor direction:CW
    delay(50);                     	//Debounce
   }
   else {						
    digitalWrite(MOTOR1, LOW);		//stop
    digitalWrite(MOTOR2, LOW);		//stop
    delay(50);                     	//Debounce
   } 
   s2=digitalRead(PBS2);
   if(s2==0)	{					// While button is pressed...
    digitalWrite(MOTOR1, HIGH);		//Motor direction:CCW
    digitalWrite(MOTOR2, LOW);		//Motor direction:CCW
    delay(50);                     	//Debounce
   }
   else	 {
    digitalWrite(MOTOR1, LOW);		//stop
    digitalWrite(MOTOR2, LOW);		//stop
    delay(50);                     	//Debounce
   }
   }