There are already a few Minecraft patterned parts (list below), codes are not wonderfully well structured.
Guess in your case 3003ptc1 (etc...) would be OK.
Guess in your case 3003ptc1 (etc...) would be OK.
Code:
Brick 1 x 1 with Minecraft Micro Mob Creeper Face Pattern L:\LDraw\parts\3005p04.dat
Figure Minecraft Micro Mob Creeper L:\LDraw\parts\3005p04c01.dat
Figure Minecraft Micro Mob Steve L:\LDraw\parts\3024ptc2c01.dat
Plate 1 x 1 with Minecraft Micro Mob Enderman Eyes Pattern L:\LDraw\parts\3024ptc8.dat
Plate 1 x 1 with Minecraft Micro Mob Steve Eyes Pattern L:\LDraw\parts\3024ptc2.dat
Plate 1 x 1 with Minecraft Micro Mob Steve Nose/Mouth Pattern L:\LDraw\parts\3024ptc3.dat
Plate 1 x 1 with Minecraft Micro Mob Villager Eyes Pattern L:\LDraw\parts\3024ptc6.dat
Plate 1 x 1 with Minecraft Micro Mob Villager Mouth Pattern L:\LDraw\parts\3024ptc7.dat
Plate 1 x 1 with Minecraft Micro Mob Zombie Eyes Pattern L:\LDraw\parts\3024ptc4.dat
Plate 1 x 1 with Minecraft Micro Mob Zombie Mouth Pattern L:\LDraw\parts\3024ptc5.dat
Tile 1 x 1 with Minecraft Micro Mob Pig Face Pattern L:\LDraw\parts\3070bpt1.dat
List generated on 2015-02-16 by LDFind Version 1.3.5.3.