Keyestudio 4DOF Manual page 95

// open the claw
for(pos4;pos4<100;pos4++)
{
myservo4.write(pos4);
}
delay(1000);
// right servo rotates to 100 degrees
for(pos2;pos2>50;pos2--)
{
myservo2.write(pos2);
delay(5);
}
// left servo rotates to 5 degrees
for(pos3;pos3>50;pos3--)
{
myservo3.write(pos3);
delay(5);
}
delay(1500);
// close the claw
92