Well.i just play minecraft normally and after that,something happen,i go to youtube a i found a iron golem farm,i quickly download it and use my mcedit to copy it and paste it in my world.Everthing works fine.After that,i build some redstone stuff such like redstone wheat farm,cocao bean and all the good stuff.But,when i quit,it load half way and my computer lag alot so i just turn off the power,the next day,i open the world,i was not able to do so,so,i go to my minecraft folder,and i saw a crash-report and inside it say,hahahahaha your minecraft have run out of memory and it gave me the report.I try to open it about 5 times and after that,i go to my mcedit to try and delete the iron farm,but i found a saving error,it have a hole which break the bedrock.So,i try to fix the hole with dirt,but,it gave me error,i decided to delete the world,after i delete it,when i try to open my minecraft,it did not show up the thing that usually pop out when you open minecraft.

Anyone know how to fix it?its already about 2 week i cant play it.Thanks for reading.Please help me.