a {
  background-image: initial;
}

b {
  background-image: inherit;
}

c {
  background-image: unset;
}

d {
  background-image: none;
}

e {
  background-image: none, none;
}

f {
  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAABmJLR0QA/wD/AP+gvaeTAAAAFUlEQVQImQXBAQEAAACAEP9PF1CpMCnkBftPnd1xAAAAAElFTkSuQmCC");
}

g {
  background-image: linear-gradient(45deg, rgb(255,0,0) 10%, rgb(0,128,0) 20px);
}

h {
  background-image: linear-gradient(to top, rgb(0,0,255), rgb(0,0,0));
}

i {
  background-image: linear-gradient(to bottom left, rgb(0,0,255), rgb(0,0,0));
}

j {
  background-image: linear-gradient(rgb(255,255,0), rgb(0,0,255));
}

k {
  background-image: repeating-linear-gradient(45deg, rgb(255,0,0) 10%, rgb(0,128,0) 20px);
}

l {
  background-image: repeating-linear-gradient(to top, rgb(0,0,255), rgb(0,0,0));
}

m {
  background-image: repeating-linear-gradient(to bottom left, rgb(0,0,255), rgb(0,0,0));
}

n {
  background-image: repeating-linear-gradient(rgb(255,255,0), rgb(0,0,255));
}

o {
  background-image: cross-fade(40% linear-gradient(rgb(0,0,255), rgb(0,0,0)), linear-gradient(rgb(0,0,0), rgb(255,0,0)));
}

p {
  background-image: cross-fade(linear-gradient(rgb(0,0,255), rgb(0,0,0)), linear-gradient(rgb(0,0,0), rgb(255,0,0)));
}

q {
  background-image: cross-fade(40% linear-gradient(rgb(0,0,255), rgb(0,0,0)));
}

r {
  background-image: -gtk-icontheme("object-select-symbolic");
}

s {
  background-image: -gtk-scaled(-gtk-icontheme("object-select-symbolic"),linear-gradient(rgb(255,255,0), rgb(0,0,255)));
}

t {
  background-image: -gtk-gradient (linear, left top, left bottom, from (rgb(255,0,0)), to (rgb(0,128,0)));
}

u {
  background-image: -gtk-gradient (linear, center center, 0.20000000000000001 bottom, from (rgb(0,0,0)), color-stop (0.5, rgb(128,128,128)), to (rgb(255,255,255)));
}

v {
  background-image: -gtk-gradient (radial, left top, 0.10000000000000001, left bottom, 0.29999999999999999, from (rgb(0,0,0)), to (rgb(0,0,255)));
}