Controlling VGA VSYNC and HSYNC

Hi!
I'm working on a project where I need to keep a VGA monitor on.
I managed to do so using esp8266 and espvgax library and using only the VSYNC and HSYNC wires.

Now the problem is that I can't use WiFi while the library is working.
I Just need the VSYNC and HSYNC to do something as if it's drawing something to the screen just for it to stay on.

If I do :
VGA.init()
// Draw something
VGA.stop()
the screen is going into sleep.

Any ideas or pieces of code that can only do the VSYNC and HSYNC signals?

Thanks!!

Here's an interesting question:

Why?

It may or may not be essential, but it would be useful to understand why you need to keep a monitor displaying with nothing on the screen.

Is it perhaps for a chicken incubator?