how can i control light on/off from arduino and wall switch

i would like to control light on/off from arduino and wall switch. can anyone suggest/help me how can i implement.

please help me.

Suggest you type "control light switch" into the search box top-right of this page. There are lots of existing threads.

i put a picture of controled lighting via web

all you need to do it are here: https://forum.arduino.cc/index.php?topic=417476.0

just a little problem with internet disconnect under investigation

if you reset the arduino all work fine

the relay control the red wire,

but no dimming at this time, just on and off