if (this.px2 != -1)
        {
            Vertex[] line =
            [
                Vertex(Vector2f(this.px1, this.py1), Color(250, 100, 13)),
                Vertex(Vector2f(x1, y1), Color(250, 100, 13))
            ];
            Vertex[] line2 =
            [
                Vertex(Vector2f(this.px2, this.py2), Color(100, 13, 250)),
                Vertex(Vector2f(x2, y2), Color(100, 13, 250))
            ];
            this.hist ~= line;
            this.hist ~= line2;

            foreach (Vertex[] dLine; this.hist)
            {
                this.window.draw(dLine, PrimitiveType.Lines);
            }
        }

        this.px2 = x2;
        this.py2 = y2;
        this.px1 = x1;
        this.py1 = y1;