▁scheduled ▁distance ▁or ▁after ▁an ▁invalid ▁green - white - check ered ▁restart ▁ ▁If ▁a ▁ca ution ▁period ▁starts , ▁or ▁continues , ▁any ▁time ▁with ▁two ▁la ps ▁remaining ▁in ▁the ▁scheduled ▁distance , ▁ ▁NAS C AR ▁allows ▁at ▁least ▁one ▁attempt ▁to ▁finish ▁the ▁race ▁under ▁green ▁flag ▁conditions . ▁From ▁ 2 0 0 4 ▁through ▁ 2 0 0 9 , ▁one ▁attempt ▁was ▁allowed ; ▁starting ▁in ▁ 2 0 1 0 , ▁up ▁to ▁three ▁attempts ▁can ▁be ▁made . ▁This ▁began ▁with ▁the ▁ 2 0 1 0 ▁Bud we iser ▁Sho ot out . ▁With ▁two ▁la ps ▁to ▁go , ▁during ▁an ▁official ▁green - white ▁check ered , ▁Jeff ▁Gordon ▁got ▁into ▁the ▁back ▁of ▁Greg ▁B iff le , ▁creating ▁a ▁multi - car ▁w reck ▁and ▁giving ▁the ▁win ▁to ▁Kevin ▁Har v ick . ▁ ▁When ▁it ▁is ▁determined ▁that ▁the ▁track ▁is ▁clear ▁for ▁racing , ▁the ▁green ▁flag ▁is ▁shown , ▁indicating ▁the ▁restart . ▁As ▁the ▁leader ▁comple tes ▁the ▁first ▁lap , ▁the ▁white ▁flag ▁is ▁shown , ▁signal ing ▁the ▁final ▁lap . ▁As ▁the ▁leader ▁comple tes ▁the ▁second ▁lap , ▁the ▁check ered ▁flag ▁is ▁shown , ▁signal ing ▁the ▁conclusion ▁of ▁the ▁race . ▁ ▁From ▁ 2 0 1 0 ▁until ▁ 2 0 1 5 , ▁if ▁the ▁ca ution ▁flag ▁was ▁shown ▁during ▁the ▁first ▁of ▁the ▁two ▁la ps , ▁positions ▁would ▁be ▁fro zen ▁as