Infinite sand generator(1.8.1

From Glitches

Place sand/gravel blocks down and then sticky side facing the sand place sticky pistons on top of them. Make a random pulse generator(redstone device) and attach the redstone to the pistons. after this is done it will continually make sand blocks for you to collect and your placed blocks will never disappear. Infinite sand. WARNING: this glitch is fixed in 1.9 pre release 6+. Works with gravel also, can sometimes make flint.