PASO A PASO

<canvas width="600" height="400"> </canvas>
<script>
    var pantalla = document.querySelector("canvas");
    var pincel = pantalla.getContext("2d");

    pincel.fillStyle = "lightgray";
    pincel.fillRect(0,0,600,400);

    pincel.fillStyle = "green";//propiedad o color
    pincel.fillRect(0,0,200,400);//funcion

    pincel.fillStyle = "red";
    pincel.fillRect(400,0,200,400);

    pincel.fillStyle = "yellow";
    pincel.beginPath();
    pincel.moveTo(300,200);
    pincel.lineTo(200,400);
    pincel.lineTo(400,400);
    pincel.fill();

    pincel.fillStyle = "blue";
    pincel.beginPath();
    pincel.arc(300,200,50,0,2*3.14)
    pincel.fill();

</script>

<canvas width="600" height="400"> </canvas>
<script>
    var Creeper = document.querySelector("canvas");
    var pincel = Creeper.getContext("2d");

    pincel.fillStyle = "lightblue";
    pincel.fillRect(0,0,600,400);

    pincel.fillStyle = "green";
    pincel.fillRect(125,50,350,300);
    //cabeza


    pincel.fillStyle = "black";
    pincel.fillRect(175,110,90,90);
    //ojo 1

    pincel.fillStyle = "black";
    pincel.fillRect(335,110,90,90);
    //ojo 2

    pincel.fillStyle = "black";
    pincel.fillRect(265,200,70,100);
    //nariz

    pincel.fillStyle = "black";
    pincel.fillRect(225,240,40,110);
    //boca lado 1

    pincel.fillStyle = "black";
    pincel.fillRect(335,240,40,110);
    //boca lado 2

</script>

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

<script>

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

    pincel.fillStyle = "lightblue";
    pincel.fillRect(0,0,600,400);



    pincel.fillStyle = "black";
    pincel.beginPath();
    pincel.moveTo(50,50);
    pincel.lineTo(50,400);
    pincel.lineTo(400,400);
    pincel.fill();

    pincel.fillStyle = "white";
    pincel.beginPath();
    pincel.moveTo(100,175);
    pincel.lineTo(100,350);
    pincel.lineTo(275,350);
    pincel.fill(); 

</script>