Add the comma-separated list of shadows to add more than one shadow, with the text-shadow property. You can try to run the following to learn how to add multiple shadows in a single line
Example
<!DOCTYPE html> <html> <head> <style> h1 { text-shadow: 0 0 3px red, 0 0 4px green, 0 0 5px blue; } </style> </head> <body> <h1>Heading One</h1> <p>Above heading has multiple text shadow effects.</p> </body> </html>