bridge

-- This builds a bridge 64 blocks long

-- Helper functions
local function fwd()
    while not turtle.forward() do
        turtle.dig()
    end
end

-- Check fuel
if turtle.getFuelLevel() < 128 then
    print("Please provide at least 128 fuel")
    return
end

-- Check for enough blocks
if turtle.getItemCount(1) < 64 then
    print("Please place 64 blocks in slot 1")
    return
end

-- Build bridge
turtle.select(1)
for i = 1, 64 do
    fwd()
    turtle.placeDown()
end

-- Come back
for i = 1, 64 do
    turtle.back()
end