Blink the webcam light!

Question

This challenge is inspired by Blink the CAPS LOCK by zeppelin.

Most webcams feature a small integrated LED light, indicating if the webcam is in use, as controlled by a hardware mechanism to prevent spying.

Your task is to blink it:

1. Turn it on.
2. Wait for 0.5 (±0.1) seconds.
3. Turn it off again.
4. Wait for 0.5 (±0.1) seconds;
5. Repeat.

Please include a GIF or video of the webcam blinking, if possible. If an answer doesn't have the GIF, please add a GIF of the program running.

Rules

• If your language is missing a subsecond sleep command, your program may use a 1 second delay instead, at a penalty of an additional byte. (replacing .5 with 1)
  • If your language, for some reason, doesn't support .5, your penalty is 2 bytes. (replacing 0.5 with 1)
• Your program must loop unless halted by the user.
• Your LED can start either on or off; whichever is more beneficial can be used.
• If your LED has a turning-off delay, then it doesn't have to be taken into account, unless if you want to provide an additional version.
  • See this comment and its answer for more information.

Scoring

This is code-golf, which means the shortest answer in bytes wins.

Answer 1

MATLAB, 40 bytes

while 1;w=webcam;pause(.5);delete(w);end

Creates an infinite while loop and each time through the loop, a webcam object is initialized (turns on the webcam), the script is paused for 0.5 seconds using pause, and then the webcam object is deleted (turning the webcam off).

Answer 2

Python, 82 bytes

(Uses OpenCV for accessing the webcam.)

import cv2,time
s=time.sleep
while 1:w=cv2.VideoCapture(0);s(.5);w.release();s(.5)

Answer 3

Javascript (ES6), 100 bytes

(f=_=>navigator.getUserMedia({video:1},x=>s(_=>x.getTracks()[0].stop(s(f,500)),500),s=setTimeout))()

During my testing, I saw a delay between the camera being activated and the LED turning on, so the timing may not be perfect. It also must run on an https:// page.

Answer 4

Scratch in scratchblocks2, 61 bytes

when gf clicked
turn video[on v
wait(.5)secs
turn video[off v

Sorry about the absolutely terrible video. My LED has a slight turning-on delay, it is very faint, and the GIF is 18 MB.