on step on packed ice:
    if {speedboost::%event-block%} is set:
        push player horizontally forward at speed 15
on place:
    if player's tool is packed ice of fortune 10 named "&b&lSpeedBoost":
        set {speedboost::%event-block%} to now
        send "&aPostawiles speedboost!"
on break:
    if event-block is packed ice:
        if {speedboost::%event-block%} is set:
            clear {speedboost::%event-block%}
            cancel event
            set block to air
            drop 1 packed ice of fortune 10 named "&b&lSpeedBoost" at event-block
            send "&aZniszczyles speed boost!"