Creeper - Minecraft

<canvas width="600" height="400">
</canvas>

<script>

    var pantalla = document.querySelector("canvas");
    var pincel = pantalla.getContext("2d");

    function fnc_draw(P_POS_X, P_POS_Y, P_WIDTH, P_HEIGTH)
    {
        pincel.fillRect(P_POS_X, P_POS_Y, P_WIDTH, P_HEIGTH);
    }

    function fnc_set_color(P_COLOR)
    {
        pincel.fillStyle = P_COLOR;
    }

    fnc_set_color("green"); 
    fnc_draw(0,0,350,300); //Cabeza

    fnc_set_color("black");
    fnc_draw(50,55,90,90); //Ojo_1

    fnc_draw(210,55,90,90); // Ojo_2

    fnc_draw(140,145,70,100);//Nariz

    fnc_draw(100,190,40,110);//Pierna_1

    fnc_draw(210,190,40,110);//Pierna_2


    fnc_set_color("red");
    fnc_draw(0,0,10,300)

    fnc_set_color("white");
    fnc_draw(10,0,10,300)

    fnc_set_color("blue");
    fnc_draw(20,0,10,300);        

</script>