#primary-nav > ul > li:nth-child(1n+1){border-bottom: solid 3px #ffb500;}
#primary-nav > ul > li:nth-child(2n+2){border-bottom: solid 3px #ed5ca3;}
#primary-nav > ul > li:nth-child(3n+3){border-bottom: solid 3px #83c000;}
#primary-nav > ul > li:nth-child(4n+4){border-bottom: solid 3px #ef3131;}
#primary-nav > ul > li:nth-child(5n+5){border-bottom: solid 3px #c889c0;}
#primary-nav > ul > li:nth-child(6n+6){border-bottom: solid 3px #e10052;}
#primary-nav > ul > li:nth-child(7n+7){border-bottom: solid 3px #7773ff;}
#primary-nav > ul > li:nth-child(8n+8){border-bottom: solid 3px #ff89ff;}
#primary-nav > ul > li:nth-child(9n+9){border-bottom: solid 3px #ffff00;}
#primary-nav > ul > li:nth-child(10n+10){border-bottom: solid 3px #a9834f;}
#primary-nav > ul > li:nth-child(11n+11){border-bottom: solid 3px #7cc623;}
#primary-nav > ul > li:nth-child(12n+12){border-bottom: solid 3px #00ffff;}