AT&T 6300 Programmer's Manual page 576

Programming the LUT
In this example, any item displayed using palette
position 7 blinks rapidly between red, blue, green,
and brown.
Palette Position
4-6
LUT
Row 0
0
to
3
4
tl
7
8
t2
11
12
t3
15
4-Color
Fast Blink
7
red
blue
green
brown
15