Shoot block from player's location

[Zunzik11]

trigger:
set {_shooting} to true
loop 10 times:
if {_shooting} is true:
set {drop} to player's location
add 0.5 to y-coordinate of {_shooting}
make player shoot an item projectile of 1 of yellow wool at speed 1
wait 1 tick
wait 200 ticks
set {_shooting} to false

I need to do make player shoot a yellow wool from his legs. How can I make his y-coordinate lower and make him shoot from his location?

 

[NixTer]

you can do

shoot an item projectile of 1 of yellow wool at speed 1 from location 1 below player

 

[Zunzik11]

shoot an item projectile of 1 of yellow wool at speed 1 from location 1 below player

Can't understand this condition/effect: shoot an item projectile of 1 of yellow wool at speed 1 from location 1 below player