Keyestudio 4DOF Manual page 140

{
myservo3.write(pos3);
delay(5);
}
delay(1500);
// close the claw
for(pos4;pos4>0;pos4--)
{
myservo4.write(pos4);
}
delay(1000);
// left servo rotates to100 degrees, rocker arm lifts.
for(pos3;pos3<120;pos3++)
{
myservo3.write(pos3);
delay(5);
}
delay(1000);
// turn to left
for(pos1;pos1<180;pos1++)
{
myservo1.write(pos1);
delay(5);
137