gistfile1.txt

function draw_line_in_circle(offset, length, width, degree)
        cairo_set_line_width(cr, width)
        point = (math.pi / -180) * degree
        start_x = 0 + (offset * math.sin(point))
        start_y = 0 - (offset * math.cos(point))
        end_x = 0 + ((offset + length) * math.sin(point))
        end_y = 0 - ((offset + length) * math.cos(point))
        cairo_move_to(cr, start_x + center_x, start_y + center_y)
        cairo_line_to(cr, end_x + center_x, end_y + center_y)
        cairo_set_source_rgb (cr, 0, 10, 10);
        cairo_stroke(cr)
end