first house

function line(dlina,from)
    for x = 1 , dlina do
        if turtle.getItemCount() == 0 then
            turtle.select(2)
        end
        turtle.turnRight()
        searchBlock(from)
        turtle.placeDown()
        turtle.turnLeft()
        turtle.forward()
    end
end
function square(dlina,from)
    for b = 1, 4 do
        line(dlina,from)
        turtle.turnRight()
    end
end
function cube(length,height,from)
    for s = 1 , height do
        square(length,from)
        turtle.up()

    end
end

function pyramid(size,from)
    squareSize = size
    squareNum = math.ceil(size / 2)
    for y = 1, squareNum do
        square(squareSize,from)
        turtle.forward()
        turtle.turnRight()
        turtle.up()
        turtle.forward()
        turtle.turnLeft()
        squareSize = squareSize - 2
    end
end
function roof(size)
    pyramid(size, 5)
    half = math.ceil(size / 2)
    for i = 1, half do
        turtle.back()
    end
    turtle.turnLeft()
    for i = 1, half do
        turtle.forward()
    end
    turtle.turnRight()
    for i = 1, half - 1 do
        turtle.down()
    end
    pyramid(size, 9)
end

function searchBlock(from)
    current = from
    turtle.select(current)
    while turtle.getItemCount() == 0 do
        current = current + 1
        turtle.select(current)
    end

end
function house(lenght, height)
    cube(lenght,height, 1)
    roof(lenght)
end

-- PROGRAM
house(7, 3)