Useless machine (delaying a servo)

Other Hardware Motors, Mechanics, Power and CNC
4

Then why not something like:

void loop ()
{
  if (digitalRead(switchpin) == HIGH)  // or whatever value you meant
  {
     delay(4000);
     useless.write(250); 
     while (digitalRead(switchpin) == LOW)        // I rather guessing what your switch input means...
     {}
     useless.write(40); 
  }
}