create a minecraft arena with area ...

create a minecraft arena with area of 101x101 blocks of playable area and make it in sci fi theme and use high building and make 2 gates of like 15x15x7 blocks and it should be opposite what I mean by opposide it that I am a here and the 180 degree straight is my opposite understand do it same on other side and on above the gates make robots on both doors okay and gates should be out of playable area and on center perfect then make playable area of smooth sandstone I dont need any texture in that then on walls and design don't use a new block on every other freaking block just use a one block in chunks like make it look asthetic not like just it is looking good from away it should look good from nearby so like dont change texture every other block use a texture way like lines or after ever