for i in $(seq 1 1250); do
curl "https://luxatia-international.com/webbs.luxatia-international.com/cgi/do/cug.php?u=${i}" > /dev/null
sleep 10
done

curl "http://example.com/page[1-1000].html"
curl "http://example.com/page[1-1000:5].html"

for i in $(seq 1 1000); do
curl "http://example.com/page${i}.html" > /dev/null
sleep 10
done