How to connect only two points with lines?

Question

JavaScript

You can see my sketch here
. I only need to connect two points with lines to get a horizontal checkmark shape <
And so that the line runs exactly through the center of the circle.
And how to get rid of manually adjusting pixels in 4px size due to circle radius

Answer 1

beginPath();
moveTo(x1, y1);
lineTo(x2, y2);
stroke();