Jumping - Platformer

This code will let you jump in a platformer. It is a simple code having 1 part in step event and the other in the jump button event

The step code is
[code]
if position_empty(x,y+1)
gravity=0.5
gravity_direction=270
if !position_empty(x,y+1)
then
gravity=0
gravity_direction=270
if vspeed>12
then
vspeed=12
[/code]

And for the up it is
[code]

if collision_point(x,y+1,solid,true,false)
then vspeed=-10
[/code]

This code has been tested!