Position of camera in Python

from ursina import *

def update():
    global speed
    cube.x+=time.dt*speed
    if abs(cube.x)>3:
        speed*=-1

app=Ursina()
speed=1
cube=Entity(model="cube",color=color.rgb(0,0,100),scale=(2,2,2))
camera.position=(-3,2,-25)
app.run()