ComputerCraft Farming Script

--[[ FARM program v0.3 ]]--

print("Please input how far forward the turtle should go...")
y = io.read()
print("Please input the number of columns there are...")
x = io.read()

print("You should place the turtle at the X.")
for rowsSample=0,y-1,1 do
    print(string.rep('.',x))
end
print("X"..string.rep('.',x-1))
print("Input Y to continue.")
confirmation = io.read()

if confirmation ~= "Y" then
    print("Cancelled farming...")
    return
end

alternating = false
function alternateTurn()
    if alternating then
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
    else
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
    end
end

function checkCrop()
    local exists, data = turtle.inspectDown()
    if exists and data.name == "minecraft:wheat" and data.metadata == 7 then
        turtle.digDown()
        turtle.placeDown()
    end
end

for ax=1,x,1 do
    for ay=1,y,1 do
        checkCrop()
        turtle.forward()
    end
    checkCrop()
    alternateTurn()
    alternating = not alternating
end