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Display full colour range in terminal window
awk 'BEGIN{
s="/\\/\\/\\/\\/\\"; s=s s s s s s s s s s s s s s s s s s s s s s s;
for (colnum = 0; colnum<256; colnum++) {
r = 255-(colnum*255/255);
g = (colnum*510/255);
b = (colnum*255/255);
if (g>255) g = 510-g;
printf "\033[48;2;%d;%d;%dm", r,g,b;
printf "\033[38;2;%d;%d;%dm", 255-r,255-g,255-b;
printf "%s\033[0m", substr(s,colnum+1,1);
}
printf "\n";
}'
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