Need some help with merging two scripts

[Kimzer]

Your example worked somewhat. But it wouldnt continiue after pir had seen movement

This is how it looks after ive been tinkering.
The error is here on line 17:

        end time = time.time + (light_on_delay * 60)

And this is the error message:

  File "button.py", line 17
    end time = time.time + (light_on_delay * 60)
           ^
SyntaxError: invalid syntax

import RPi.GPIO as GPIO
import time

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.IN) #Read output from PIR motion sensor
GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP)

light_on_delay = 15  # time in min for light to stay on when button pressed
button_pressed = 0

while True:
    # check for button press
    input_state = GPIO.input(18)
    if input_state == False:
        print('Button Pressed')
        end time = time.time + (light_on_delay * 60)
        button_pressed = 1
        #exec(open("./LightsOn.py").read(), globals())
        print('button push')
    
   
    # check if button has been pressed if it has check to see if time is up
    if button_pressed == 1:
        if time.time > end:
            button_pressed = 0
        
    else:
    
        i=GPIO.input(4)
        if i==0:            #When output from motion sensor is LOW
            print ('No movement detected - Turning lights off')
            #exec(open("./LightsOn.py").read(), globals()) 
            print ('off')
            time.sleep(0.1)
        else:               #When output from motion sensor is HIGH
            print ('Movement detected - Turning lights on')
            #exec(open("./LightsOff.py").read(), globals())
            print ('on')
            time.sleep(60 * 15)

    # added delay to prevent program using 100% cpu time.
    time.sleep(0.5)