Can somebody make this toggle for me?

[ImmortalApollo]

This code works great, but it would be much better if somebody could make it so pressing F3 would turn it on and off. Can anyone do that for me? Thanks.

F3::
loop
{
send, {a down}
sleep, 500
send, {a up}

sleep, 100

send, {d down}
sleep, 500
send, {d up}

sleep, 100
}
return


PS: This is my first post so sorry if i break any rules

[divanebaba]

Look here.
The definitive autofire thread!