CaveFinder

#  The digUp() call in bedrockcheck is simply to make sure that the turtle definitely gets to the surface; in case sand has fallen down or something.
#   In bedrockcheck, comeup() is called in response to turtle.digDown() responding false, which it will do in the case of bedrock.
#  This ended up fairly complicated, so I've split it into multiple functions so that it is readable.

function comeup()
	for i=1,59
	do
	turtle.digUp()
	turtle.up()
	end
end

function bedrockcheck()
	if not turtle.digDown() then
	comeup()
	break
	end
end

function godown()
	while turtle.detectDown() do
	turtle.digDown()
	turtle.down()
	end
end

function cavefind()
    while not turtle.detectDown() do
    comeup()
    end
end

godown()
cavefind()
bedrockcheck()
comeup()