You can join the options using a "+" character. e.g. http://cat.jpg.to/r+l+gif is a random large cat gif image. options available:

"jpg" "gif" "png"

"face" "photo" "clipart" "lineart"

"black" "blue" "brown" "gray" "green" "orange" "pink" "purple" "red" "teal" "white" "yellow"

"huge" "xxl" "xxlarge" "xl" "xlarge" "l" "large" "m" "medium" "s" "small" "xs" "i" "icon"

"r" "random"