Ok, I found paper I wrote a long time ago together with a page from MAD magazine from 1985, I don´t know if it works!
I can´t test it on my TI because I don´t have Missing Link available on my TIPI yet.
I don´t remember much of Missing Link, but my guess is that I "ported" this to Missing Link from the Apple II and Atari code from the magazine back in the days.
Here is the little program, if there are someone able to try it and let me know what it do?
(BTW, on line 20, the CALL LINK("COLOR",7,1) was on the paper CALL LINK(COLOR,7,1), I don´t know if the one without quotes are right).
10 A=1.2 :: XC=150 :: YC=110