background: linear-gradient(yellow, red);

background: linear-gradient(to right, yellow, red);

background: linear-gradient(to bottom right, yellow, red);

background: linear-gradient(20deg, yellow, red);

background: linear-gradient(hsl(0,100%,50%), hsl(60,100%,50%), hsl(120,100%,50%), hsl(180,100%,50%), hsl(240,100%,50%), hsl(300,100%,50%));

background: linear-gradient(135deg, hsl(36,100%,50%) 10%, hsl(72,100%,50%) 60%, white 90%);