prepQuarry

os.loadAPI("t")

local bedrock = false
local y = 0

while not bedrock do
    y = y+1
    local dugDwn = t.digDown()

    if dugDwn == false then
        bedrock = true
    end
    else then
        t.down()
    end
end

for i=0, y do
    t.up()
    turtle.select(1)
    turtle.placeDown()
end