#include <Servo.h>

#define horizontal_pin 3
#define vertical_pin 6
#define claw_pin 5

Servo horizontal, vertical;
Servo claw;

void setup() {
  horizontal.attach(horizontal_pin);
  vertical.attach(vertical_pin);
  claw.attach(claw_pin);

  horizontal.write(0);
  vertical.write(0);
  claw.write(0);
}

void loop() {
  int degree = 0;
  for(int i=0; i<6; ++i){
    horizontal.write(0);
    delay(500);
    vertical.write(90);
    delay(500);
    claw.write(90);
    delay(500);

    vertical.write(0);
    delay(500);
    horizontal.write(30+degree);
    delay(500);
    vertical.write(90);
    delay(500);
    claw.write(0);
    delay(500);
    vertical.write(0);
    delay(500);

    degree += 30;
  }
}