on script load:
        register new shaped recipe for sand named "&a&lSandFarmer" using sand, sand, sand, sand, golden apple, sand, sand, sand, sand
on place:      
        if player's tool is sand named "&a&lSandFarmer":
                loop blocks under event-block:
                        loop-block is bedrock:
                                stop loop
                        else:
                                set loop-block to sand