Turtle tree farm

print("Loading Tree Feller by: KiLLerBoy_001")
sleep(0.1)
print("..")
sleep(0.1)
print("..")
sleep(0.1)
print("..")
sleep(0.1)
print("..")
sleep(0.5)
print("Tree Feller loaded..")

cnt = 0

X = 0
Y = 0
Z = 0

HomeX = 274
HomeY = 65
HomeZ = -771



function Home()
    X,Y,Z = gps.locate()

    if Z == HomeZ and turtle.detect() == false then
        return true
    elseif Z == HomeZ and turtle.detect()== true then
        repeat
            turtle.turnLeft()
        until not turtle.detect()
        return true
    else
        return false
    end
end


function RefuelCheck()
    fuel = turtle.getFuelLevel()
    if fuel < 1000 then
        turtle.refuel()
    else
        print("No need to refuel")
        print("Fuel Level="..fuel)
    end
end

function ChopDetect()
    if turtle.detect() then
        turtle.dig()
        print("Felling Tree")
        cnt = cnt+1
        print("Turtle has felled "..cnt.." tree(s)")
    else
        sleep(0.5)
    end
    turtle.turnLeft()
    turtle.turnLeft()
    if turtle.detect() then
        turtle.dig()
        print("Felling Tree")
        cnt = cnt+1
        print("Turtle has felled "..cnt.." tree(s)")
    else
        sleep(0.5)
    end
    turtle.turnRight()
    sleep(1)
end

function ClearPath()
    if turtle.detect() then
        turtle.dig()
        sleep(0.3)
    end
end

function WalkForward(endturn)
    ClearPath()
    turtle.forward()
    repeat
        ClearPath()
        turtle.forward()
    until turtle.detectDown()
    if endturn then
        turtle.turnRight()
    end
end

function StepLeft(x,y)
    turtle.turnLeft()
    sleep(0.2)
    for i = 1,x,1
    do
        ClearPath()
        sleep(0.2)
        turtle.forward()
    end

    for i = 1,y,1
    do
        turtle.forward()
        sleep(0.2)
    end
    turtle.turnRight()
end

function StepRight(x,y)
    turtle.turnRight()
    sleep(0.2)
    for i = 1,x,1
    do
        ClearPath()
        sleep(0.2)
        turtle.forward()
    end

    for i = 1,y,1
    do
        turtle.forward()
        sleep(0.2)
    end
    turtle.turnLeft()
end

if Home() then
    MainThread = true
else
    MainThread = false
end


while MainThread do

WalkForward(true)
ChopDetect()

WalkForward(true)
ChopDetect()

WalkForward(true)
ChopDetect()

RefuelCheck()

turtle.turnRight()
turtle.turnRight()
WalkForward(false)
WalkForward(false)
WalkForward(false)
turtle.turnLeft()
turtle.turnLeft()

sleep(10)

end