function love.load()
    text = "Sandbox"
    love.graphics.setBackgroundColor(0, 128, 55)
    -- герой
    hero = {
    x = 16,
    y = 16,
    xstart = x,
    ystart = y,
    speed = 300,
    hp = 100,
    w = 32,
    h = 32,
    }
    -- друг
    friend = {
    x = 320,
    y = 240,
    xstart = x,
    ystart = y,
    speed = 200,
    hp = 100,
    w = 16,
    h = 16,
    ai = 0
    }
    -- выход
    quit = {
    x = love.mouse.getX(),
    y = love.mouse.getY(),
    xstart = x,
    ystart = y,
    w = 16,
    h = 16,
    }
end

-- step

function love.update(dt)
    if love.keyboard.isDown("escape") then
    love.event.push("q")    -- <  0.8
    love.event.push("quit") -- >= 0.8
    end
    -- функции
    hero_movement(dt)
    friend_movement(dt)
    -- рестарт
    if love.keyboard.isDown("r") then
    hero.x = hero.xstart
    hero.y = hero.ystart
    friend.x = friend.xstart
    friend.y = friend.ystart
    end
end

-- draw

function love.draw()
    love.graphics.setColor(255, 255, 255, 255)
    love.graphics.print(text, 0, 0)
    -- функции
    hero_draw()
    friend_draw()
    quit_draw()
end

-- коллизии

function CheckCollision(ax1, ay1, aw, ah, bx1, by1, bw, bh)
    local ax2, ay2, bx2, by2 = ax1 + aw, ay1 + ah, bx1 + bw, by1 + bh
    return ax1 < bx2 and ax2 > bx1 and ay1 < by2 and ay2 > by1
end

    -- герой

-- движение

function hero_movement(dt)
    -- вверх
    if love.keyboard.isDown("up") or love.keyboard.isDown("w") then
    hero.y = hero.y - hero.speed * dt
    end
    -- вниз
    if love.keyboard.isDown("down") or love.keyboard.isDown("s") then
    hero.y = hero.y + hero.speed * dt
    end
    -- влево
    if love.keyboard.isDown("left") or love.keyboard.isDown("a") then
    hero.x = hero.x - hero.speed * dt
    end
    -- вправо
    if love.keyboard.isDown("right") or love.keyboard.isDown("d") then
    hero.x = hero.x + hero.speed * dt
    end
    -- коллизии
    -- друг
    if CheckCollision(hero.x, hero.y, hero.w, hero.h, friend.x, friend.y, friend.w, friend.h) then
    friend.ai = 1
    end
    -- выход
    if CheckCollision(hero.x, hero.y, hero.w, hero.h, quit.x, quit.y, quit.w, quit.h) then
        if friend.ai == 1 then
        love.graphics.print("You completed the level!", love.mouse.getX(), love.mouse.getY())
        end
    end
end

function hero_draw()
    --love.graphics.draw(image, hero.x, hero.y)
    love.graphics.setColor(255, 255, 255, 255)
    love.graphics.rectangle("fill", hero.x, hero.y, hero.w, hero.h)
end

    -- друг

-- движение

function friend_movement(dt)
    -- герой взял к себе в компанию
    if friend.ai == 1 then
        -- влево
        if friend.x > hero.x then
        friend.x = friend.x - friend.speed * dt
        end
        -- вправо
        if friend.x < hero.x then
        friend.x = friend.x + friend.speed * dt
        end
        -- вверх
        if friend.y > hero.y then
        friend.y = friend.y - friend.speed * dt
        end
        -- вниз
        if friend.y < hero.y then
        friend.y = friend.y + friend.speed * dt
        end
    end
end

-- рисование

function friend_draw()
    --love.graphics.draw(image, hero.x, hero.y)
    love.graphics.setColor(0, 112, 255, 255)
    love.graphics.rectangle("fill", friend.x, friend.y, friend.w, friend.h)
    love.graphics.setColor(255, 255, 255, 255)
    love.graphics.print(friend.ai, 0, 10)
end

    -- выход

-- рисование

function quit_draw()
love.graphics.setColor(0, 0, 0, 255)
love.graphics.rectangle("fill", quit.x, quit.y, quit.w, quit.h)
-- выход
    if CheckCollision(hero.x, hero.y, hero.w, hero.h, quit.x, quit.y, quit.w, quit.h) then
        if friend.ai == 1 then
        love.graphics.print("You completed the level!", love.mouse.getX(), love.mouse.getY() + 20)
        end
    end
end