#include <Stepper.h>
int btn = 7;
const int stepperRevolution = 200;

Stepper Mystepper (stepperRevolution , 8,9,10,11);

void setup() {
pinMode(7, INPUT_PULLUP);
Mystepper.setSpeed(255);



}
void loop() {
int var = digitalRead(7);
if(var == 0){
Mystepper.step(50 );
delay(450);
Mystepper.step(-50 );

}


}