from gpiozero import Servo
from gpiozero.pins.pigpio import PiGPIOFactory
from gpiozero.tools import sin_values, cos_values
from signal import pause

pigpio = PiGPIOFactory()

servo1 = Servo(4)
servo2 = Servo(14)

servo1.source = sin_values()
servo2.source = cos_values()

pause()

btn1 = Button(2)
btn2 = Button(3)

btn1.when_pressed = servo1.min
btn1.when_released = servo1.max

btn2.when_pressed = servo2.max
btn3.when_released = servo2.min