ctx.beginPath();
ctx.moveTo(, );
ctx.lineTo(, );
ctx.stroke();
To draw a line from (000, 000) to (000, 000), start a new path.
Then start a new subpath with a point at (000, 000).
Then add a second point to the subpath at (000, 000), connecting (000, 000) to (000, 000) with a straight line.
Finally, draw the path on the <canvas> by stroking it using the current stroke and line styles.