Library "new_line" TODO: plot line based on 3 points.
new_line(x_1, x_2, x_3, y_1, y_2, y_3) TODO: plot line based on 3 points. (each different) Parameters: x_1 (int) x_2 (int) x_3 (int) y_1 (float) y_2 (float) y_3 (float) Returns: TODO: new line based on each different 3 values.