This script plots sets of 3 expressions x=f(t),y=g(t),z=h(t)using a simple 3D projection. The expressions to plot are defined in a python function which takes one argument t and returns three values for x,y and z. . Plotting is performed by python function line() which takes arguments telling it which function to plot and the ranges on parameter t, and x, y, z axis. An optional text string can be added to the plot. It uses only the math and kandinsky libraries. Tested on the calculator using software version 23.2.6.