Player is looking at a block, make it explode

[Enchanted_Reeses]

So i want a skript where when the player is holding something, and looking at something, that thing explode at a force of 10
heres what i got so far, doesnt work though

every 0.1 seconds:
    loop all players:
        if 1 of loop-player's tool = stick named "&4FireBaller":
            set {explode} to 1
            set {explo} to targeted block
every 0.05 seconds:
    if {explode} is 1:
        create an explosion of force 10 at {explo}
        set {explode} to 0

"set {explo} to targeted block" doesn't work for some reason any ideas would be great!

[MrTibo]

loop-player's targeted block