You broke it!

youbrokeit.sh

#!/bin/bash
FILES=/usr/bin/*
COLOR=1

while true
  do for f in $FILES
    do cat $f
    tput setaf $COLOR
    tput bel
    
    let "COLOR=COLOR+1"
    if ((COLOR > 7)); then
      let "COLOR=1"
    fi
    
    sleep 0.05
  done
done