Sprays is a library that tries to replicate sprays from Source Engine games.

if ( Input.Pressed( "Spray" ) )
{
    Spray.Place();
}

To use a custom image, type spray "URL" in console.  Image URL must be in quotes.

Tip: Right click, Copy image address.

Example: spray "https://media1.tenor.com/m/1iSMeKmFbjgAAAAd/i-wish.gif"