digforward

function digF()
        while not turtle.forward() do
                turtle.dig()
        end
end

function moveF()
    while not turtle.dig() do
        turtle.forward()
    end
end

function tF()
        while turtle.getFuelLevel()==0  do
                turtle.refuel()
        end
end

print("Enter lenght vaule of corridor")
local lenght=read()/2

for i=1,lenght do
tF()
digF()
moveF()
end