How do i move parts one by one so the first moves, then the second and so on?

If i have 12 parts in a line from left to right and i have a GetChildren() to get all the 12 parts in that model, and i want to move each part one by one in the y-axis, how do i move the first part in the line downwards and then the second one goes, and then the third. What i am showing here is the main thing to the function.

for i,v in pairs(model:GetChildren) do
    for i = 1,20 do
        if part.name == "Part1" then
            --(cframe moving script here)
        end
    end
end

for i,v in pairs(model:GetChildren) do
    for i = 1,20 do
        if part.name == "Part2" then
            --(cframe moving script here)
        end
    end
end

Can someone help me with this? I was thinking of doing a table but i don't know how to use a part that is in a table.