Vertically and horizontally, the background picture is repeated. If the last image does not fit, it will be cropped. This is the default setting.
repeat-x
The backdrop picture is just repeated horizontally.
repeat-y
The background picture is just repeated vertically.
no-repeat
The background picture does not appear again. The image will only be displayed once.
space
The backdrop picture is repeated as many times as feasible without being clipped. The first and last pictures are pinned to the element's left and right sides, respectively, and whitespace is uniformly divided between the images.
round
To fill the space, the background picture is repeated and crushed or stretched (no gaps).
initial
This attribute is set to its default value.
inherit
This attribute is inherited from its parent element.