graphic(s) [canvas]: tutorial(s) / specification(s)

• element(s) -- <canvas id="canvas" ></canvas>
• context(s) -- var ctx = canvas.getContext("2d");
• state(s) -- fillStyle, strokeStyle, lineWidth, lineJoin
• function(s) -- ctx.fillRect (x, y, w, h)
• path(s) -- beginPath(), moveTo(x,y), lineTo(x,y), closePath(), fill() / stroke()
• curve(s) -- ctx.bezierCurveTo(60, 70, 60, 70, 70, 150)
• operation(s) -- save, restore / translate, scale, rotate

resource(s) -- processingjs / javascript