on rightclick:
    player is riding minecart
    block infront of player is stone or cobblestone
    push player's vehicle upward at speed 0.5
    loop blocks between block above block at player and block above the block 1 meters horizontal infront of player:
        loop-block is air
        set {_rail::%location of loop-block%} to location of loop-block
        set loop-block to rail
    push player's vehicle horizontal facing of player at speed 10
    wait 0.2 second
    loop {_rail::*}:
        set block at loop-value to air