LineTo

Use lineTo() method to add a new point, and then create a line from that point to the last specified point in the canvas.

Parameter	Description
x	The x coordinate of the target location of the path
y	The y coordinate of the target position of the path

Example

var ctx = node.getComponent(cc.Graphics);
ctx.moveTo(20,100);
ctx.lineTo(20,20);
ctx.lineTo(70,20);
ctx.stroke();