wow everything needs scripts nowadays
mainly since it's impossible to make a simple paralell event and make it :
if button L is pushed then
-change player speed:6 (in move event)
else
-change player speed:4
how beautiful, you can even add something sweet like that:
if button L is pushed then
-if variable(cooldown) < 200 then
--change player speed:6 (in move event)
--wait 1 frame
--variable(cooldown) +1
else
--change player speed:4
--variable(cooldown) -1
fun