Animated Crow?!

main.lua

WINDOW_WIDTH = 512
WINDOW_HEIGHT = 916

CROW_WIDTH = 48
CROW_HEIGHT = 48
CROW_ANIMATION_CHANGE = 0.25

function engine.start()
    engine.window.setTitle("Animated Crow?!")
    engine.window.setWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT)

    -- See /gameplay/resources
    font = engine.graphics.newFont("PixeloidSans.ttf", 72)
    greeting_text = engine.graphics.newText(font, "Crow(bar)", { 14, 17, 17 })

    crow_atlas = engine.graphics.loadTexture("Crow.png")
    crow_animation_frames = {
        engine.graphics.newQuad(0, 0, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(48, 0, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(96, 0, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(144, 0, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(0, 48, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(48, 48, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(96, 48, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(144, 48, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(0, 96, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(48, 96, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(96, 96, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(144, 96, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(0, 144, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(48, 144, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(96, 144, CROW_WIDTH, CROW_HEIGHT),
        engine.graphics.newQuad(144, 144, CROW_WIDTH, CROW_HEIGHT),
    }
    crow_animation_timer = 0
    crow_animation_frame = 0
end

function engine.update(dt)
    crow_animation_timer = crow_animation_timer + dt
    if (crow_animation_timer > CROW_ANIMATION_CHANGE) then
        crow_animation_frame = (crow_animation_frame + 1) % #crow_animation_frames
        crow_animation_timer = 0
    end
end

function engine.draw()
    engine.graphics.clear(210, 210, 207)

    engine.graphics.draw(greeting_text,
        (WINDOW_WIDTH - greeting_text:width()) // 2,
        (WINDOW_HEIGHT - greeting_text:height()) // 2 + 164,
        15)

    engine.graphics.draw(crow_atlas,
        crow_animation_frames[crow_animation_frame + 1],
        (WINDOW_WIDTH - CROW_WIDTH) // 2,
        (WINDOW_HEIGHT - CROW_HEIGHT) // 2)
end