Reference: drawLine
drawLine(v1, v2) draws the straight line segment between v1 ∈ R^2 and v2 ∈ R^2. drawLine(v1, v2, s) draws the straight line segment between v1 ∈ R^2 and v2 ∈ R^2 using the style (CSS) s.
drawLine(v1, v2) draws the straight line segment between v1 ∈ R^2 and v2 ∈ R^2. drawLine(v1, v2, s) draws the straight line segment between v1 ∈ R^2 and v2 ∈ R^2 using the style (CSS) s.