Script to add red tint to the entire screen.
|# Call with a percentage value from 0 to 100|
|# 0 means only red, 50 means half of green and blue is shown through|
|# if you don't give any arguments the calibration is cleared|
|if [[ -z "$1" ]]; then|
|echo Clearing all calibrations|
|echo Setting FILTER to $FILTER|
|xcalib -clear && xcalib -green 1 1 $FILTER -blue 1 1 $FILTER -alter|