Im making an element that disolves other elements simular to ACID but it keeps disolving itself. I want to check the ID of each particle before desolving it to make sure it isnt the same as its own ID.

How would i get the ID of an element?

No i mean how do i get the element ID of a part by its index.

i want to delete all elements near my element

for k, v in pairs(sim.partNeighbours(x, y, 1)) do
  if not getelementtype(v) == vdfl then
    sim.partKill(v)
  end
end

replace getelementtype(v) with the command

i want to input a specific pixel and it spit out what element that pixel is.

for k, v in pairs(sim.partNeighbours(x, y, 1)) do
   if sim.partProperty(k, "type") ~= vdfl then
      sim.partKill(v)
   end
end

this is my code now. but now the element isnt destroying itself but its not destroying anything :/