for bash:
for i in {1..100000}; do
echo -e '\r'
echo -e '\033[0K\033[1mBold\033[0m \033[7mInvert\033[0m \033[4mUnderline\033[0m'
echo -e '\033[0K\033[1m\033[7m\033[4mBold & Invert & Underline\033[0m'
echo
echo -e '\033[0K\033[31m Red \033[32m Green \033[33m Yellow \033[34m Blue \033[35m Magenta \033[36m Cyan \033[0m'
echo -e '\033[0K\033[1m\033[4m\033[31m Red \033[32m Green \033[33m Yellow \033[34m Blue \033[35m Magenta \033[36m Cyan \033[0m'
echo
echo -e '\033[0K\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
echo -e '\033[0K\033[1m\033[4m\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
echo
echo -e '\033[0K\033[30m\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
echo -e '\033[0K\033[30m\033[1m\033[4m\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
done
for fish:
for i in (seq 1 100000)
echo -e '\r'
echo -e '\033[0K\033[1mBold\033[0m \033[7mInvert\033[0m \033[4mUnderline\033[0m'
echo -e '\033[0K\033[1m\033[7m\033[4mBold & Invert & Underline\033[0m'
echo
echo -e '\033[0K\033[31m Red \033[32m Green \033[33m Yellow \033[34m Blue \033[35m Magenta \033[36m Cyan \033[0m'
echo -e '\033[0K\033[1m\033[4m\033[31m Red \033[32m Green \033[33m Yellow \033[34m Blue \033[35m Magenta \033[36m Cyan \033[0m'
echo
echo -e '\033[0K\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
echo -e '\033[0K\033[1m\033[4m\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
echo
echo -e '\033[0K\033[30m\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
echo -e '\033[0K\033[30m\033[1m\033[4m\033[41m Red \033[42m Green \033[43m Yellow \033[44m Blue \033[45m Magenta \033[46m Cyan \033[0m'
end