CircleMaker

x = nil

y = nil

z = 0

function digHole()
    while z < h do
        turtle.digDown()
        turtle.down()
        z = z + 1
    end
    while z > 0 do
        turtle.digUp()
        turtle.up()
        z = z - 1
    end
end

function testRange()
    if math.sqrt(math.pow(x, 2) + math.pow(y, 2)) <= r then
        return true
    else
        return false
    end
end

function search()
    while y <= r do
        if testRange() then
            digHole()
        end
        while x < r do
            turtle.dig()
            turtle.forward()
            x = x + 1
            if testRange() then
                digHole()
            end
        end
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        y = y + 1
        if testRange() then
            digHole()
        end
        turtle.turnRight()
        while x > -r do
            turtle.dig()
            turtle.forward()
            x = x - 1
            if testRange() then
                digHole()
            end
        end
        turtle.turnLeft()
        turtle.dig()
        turtle.forward()
        y = y + 1
        if testRange() then
            digHole()
        end
        turtle.turnLeft()
    end
end



print("+-------------------------------------+")
print("| Circle Miner                        |")
print("+-------------------------------------+")

print("+-------------------------------------+")

print("+-------------------------------------+")
read()
print("+-------------------------------------+")
print("| Radius = ?                          |")
print("+-------------------------------------+")
r = tonumber(read())

x = -r

y = -r

print("+-------------------------------------+")
print("| Height = ?                          |")
print("+-------------------------------------+")
h = tonumber(read())

search()