=linear-gradient(!from_coord, !to_coord, !color_start, !color_end, !color_stop1 = 0, !color_stop1_pos = .3, !color_stop_2 = 0, !color_stop2_pos = .9)
   !gradient = "#{!from_coord}, #{!to_coord}, from(#{!color_start}), to(#{!color_end})"
   //@if !color_stop1 != 0
   //  !gradient += "color-stop(#{!color_stop1_pos}, #{!color_stop1})"
   background= "-webkit-gradient(linear, #{!gradient})"
   background= "-moz-linear-gradient(#{!gradient})"
 
 =h-linear-gradient(!color1, !color2)
   +linear-gradient("left top", "left bottom", !color1, !color2)
 
 =v-linear-gradient(!color1, !color2)
   +linear-gradient("left top", "right top", !color1, !color2)
 
 //=h-three-color-gradient(!color1, !color2, !color3, !color3_pos = .5)
 //  +linear-gradient("left top", "left bottom", !color1, !color2, !color3, !color3_pos)