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.