function love.load()
    love.graphics.setBackgroundColor(255, 255, 255)

    gridXCount = 10
    gridYCount = 18

    inert = {}
    for y = 1, gridYCount do
        inert[y] = {}
        for x = 1, gridXCount do
            inert[y][x] = ' '
        end
    end

    pieceStructures = {
        {
            {
                {' ', ' ', ' ', ' '},
                {'i', 'i', 'i', 'i'},
                {' ', ' ', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 'i', ' ', ' '},
                {' ', 'i', ' ', ' '},
                {' ', 'i', ' ', ' '},
                {' ', 'i', ' ', ' '},
            },
        },
        {
            {
                {' ', ' ', ' ', ' '},
                {' ', 'o', 'o', ' '},
                {' ', 'o', 'o', ' '},
                {' ', ' ', ' ', ' '},
            },
        },
        {
            {
                {' ', ' ', ' ', ' '},
                {'j', 'j', 'j', ' '},
                {' ', ' ', 'j', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 'j', ' ', ' '},
                {' ', 'j', ' ', ' '},
                {'j', 'j', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {'j', ' ', ' ', ' '},
                {'j', 'j', 'j', ' '},
                {' ', ' ', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 'j', 'j', ' '},
                {' ', 'j', ' ', ' '},
                {' ', 'j', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
        },
        {
            {
                {' ', ' ', ' ', ' '},
                {'l', 'l', 'l', ' '},
                {'l', ' ', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 'l', ' ', ' '},
                {' ', 'l', ' ', ' '},
                {' ', 'l', 'l', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', ' ', 'l', ' '},
                {'l', 'l', 'l', ' '},
                {' ', ' ', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {'l', 'l', ' ', ' '},
                {' ', 'l', ' ', ' '},
                {' ', 'l', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
        },
        {
            {
                {' ', ' ', ' ', ' '},
                {'t', 't', 't', ' '},
                {' ', 't', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 't', ' ', ' '},
                {' ', 't', 't', ' '},
                {' ', 't', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 't', ' ', ' '},
                {'t', 't', 't', ' '},
                {' ', ' ', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 't', ' ', ' '},
                {'t', 't', ' ', ' '},
                {' ', 't', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
        },
        {
            {
                {' ', ' ', ' ', ' '},
                {' ', 's', 's', ' '},
                {'s', 's', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {'s', ' ', ' ', ' '},
                {'s', 's', ' ', ' '},
                {' ', 's', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
        },
        {
            {
                {' ', ' ', ' ', ' '},
                {'z', 'z', ' ', ' '},
                {' ', 'z', 'z', ' '},
                {' ', ' ', ' ', ' '},
            },
            {
                {' ', 'z', ' ', ' '},
                {'z', 'z', ' ', ' '},
                {'z', ' ', ' ', ' '},
                {' ', ' ', ' ', ' '},
            },
        },
    }

    pieceType = 1
    pieceRotation = 1
end

function love.draw()
    local function drawBlock(block, x, y)
        local colors = {
            [' '] = {.87, .87, .87},
            i = {.47, .76, .94},
            j = {.93, .91, .42},
            l = {.49, .85, .76},
            o = {.92, .69, .47},
            s = {.83, .54, .93},
            t = {.97, .58, .77},
            z = {.66, .83, .46},
        }
        local color = colors[block]
        love.graphics.setColor(color)

        local blockSize = 20
        local blockDrawSize = blockSize - 1
        love.graphics.rectangle(
            'fill',
            (x - 1) * blockSize,
            (y - 1) * blockSize,
            blockDrawSize,
            blockDrawSize
        )
    end

    for y = 1, gridYCount do
        for x = 1, gridXCount do
            drawBlock(inert[y][x], x, y)
        end
    end

    for y = 1, 4 do
        for x = 1, 4 do
            local block = pieceStructures[pieceType][pieceRotation][y][x]
            if block ~= ' ' then
                drawBlock(block, x, y)
            end
        end
    end
end