For such operations we use LocalSend.

https://f-droid.org/packages/com.jarsilio.android.scrambledeggsif
https://f-droid.org/packages/de.kaffeemitkoffein.imagepipe
https://f-droid.org/packages/org.witness.sscphase1
https://f-droid.org/packages/net.osmand.plus

It is time for you to pick some blueberries.

I have made some silly programs. One that moved the mouse pointer one pixel left, then down, right and up. It was quite annoying. Another that moved the mouse pointer when you reached the edge of the screen, touching the rightmost pixel row would move it to the left side of the screen and vice versa, same thing with top and bottom.