Execute the script passing as parameters the inferior and superior limits:
python topnius.py <inferior limit> <superior limit>
For change the delay between requests modify DOWNLOAD_DELAY parameter in CrawlerProcess constructor. The delay will be between 0.5*DOWNLOAD_DELAY and 1.5*DOWNLOAD_DELAY
process = CrawlerProcess({
'USER_AGENT': 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)',
'DOWNLOAD_DELAY': 1, #this value defines the delay between 2 requests
'RANDOMIZE_DOWNLOAD_DELAY': True, #enables random delay between 0.5*DOWNLOAD_DELAY and 1.5*DOWNLOAD_DELAY. If it is false, the delay will be DOWNLOAD_DELAY
})