gamma-burst.sh

#!/usr/bin/env bash
while :
do
    g=$(echo "
    t = $(date "+%S%N")/1000000000;
    if(t < 5 || t > 58) {
        t *= 10;
        if(t==0) {
            sinc = 1;
        } else {
            sinc = s(t)/t;
        };
        if(sinc > 0) {
            sinc *= 50;
        };
        sinc*2+1
    } else { 1 }
    " | bc -l)
    if [ "$g" != "$prev_g" ]
    then
        xrandr --output VGA1 --gamma $g:$g:$g
        sleep 0.001
    else
        sleep 0.5
    fi
    prev_g=$g
done