Summon Sideways FallingSand

In the map I'm making there is a block (Jungle Stairs) that I changed to look like a 3D player. I want to have the player skim across the ground moving 'backwards'. I am wondering if you can summon FallingSand and have it move sideways. How might I summon this?
Best Answer
you could also have made a track where there is a mob moving along a path which is summoning falling sand all the time. this is how i would do it and i would find it easier like this
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Summoning FallingSand Entities The Basics
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Answer 2
As @The_Basset_Hound said, you can't summon sand falling to other directions, but When you summon sand, it disappears in like 2 ticks (0.10 seconds), so if you set up a redstone block clock, you can just rapidly summon a FallingSand, and when you want to make it move, just change the coordinates (Example, if you want to make it go up: [X Y Z] 0 0 0, 0 0.2 0, 0 0.4 0, 0 0.6 0, 0 0.8 0, 0 1 0.)
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