startup

function up()
 if turtle.detectUp() then

 else
 turtle.up()
 up()
 end
end
function mine()
 x=0
 while x < 1 do
 turtle.digDown()
 turtle.down()
 x = x+1
 end
end
function goUp()
 if turtle.digDown() == false then
 up()
 end
end
function finish()
 x=0
 while x < 70 do
 mine()
 goUp()
 end
end
rednet.open("right")
id, message, distance = rednet.receive()
function complete()
if message == "excavate" then
 finish()
 end
end

complete()