Sass mixin - repeat same value for up to 4 properties
//Repeats same value for up to 4 properties
@mixin repeat-value($val, $prop1,$prop2,$prop3:'',$prop4:'') {
#{$prop1}:$val;
#{$prop2}:$val;
@if $prop3 != '' {#{$prop3}:$val;}
@if $prop4 != '' {#{$prop4}:$val;}
}