is f4 the key bind I want it to be? so it that changeable?

would i put this at the beginning of the script or end

So basically all I need it a way of stopping the whole script when i press on a key on my keyboard in case anything goes wrong because I wont be able to stop it as i'm using
click, ### ###

As the subject says I need the sleep command to wait 30 mins is it measured in milliseconds?

Whenever I try to run this command

MouseMove, 10, 0, 100, R

in Minecraft it just flicks straight down rather than turning right by 10 pixels