2 random blocks not working?

The purpose of this script is to raise and descend 2 random block in the jumparts model in a continuous loop until there is no more blocks in jumparts to raise, but what it does is raise the same blocks over and over again . I do not get any output errors and yes the debounce code works perfect. The blocks are random at the start but it just keeps raising and descending those 2 random block chosen at the start. Thanks for taking your time to read this post. I was to lazy to make a function for random numbers haha.

jumparts={}
for i,v in pairs(game.Workspace.jumparts:GetChildren())do
	table.insert(jumparts,i,v)
end
function ranNum()
local ranNum1=math.random(1,#jumparts)
local ranNum2=ranNum1


while ranNum1==ranNum2 do
	ranNum2=math.random(1,#jumparts)
	wait()
 end

 local blockChosen=jumparts[ranNum1]
 local blockChosen2=jumparts[ranNum2]


	if enabled==true then
		
		enabled=false
		
		 script.Parent.BrickColor=BrickColor.new("Really red")
		
	
	
     
      
	for i,v in pairs(jumparts)do
		
      while true do   
	 
		for i=4,13,0.3 do
			
		blockChosen.CFrame=CFrame.new(blockChosen.Position.x,blockChosen.Position.y+1.1,blockChosen.Position.z)
		blockChosen2.CFrame=CFrame.new(blockChosen2.Position.x,blockChosen2.Position.y+1.1,blockChosen2.Position.z)
			wait(0.1)
			
		 end
		     
		wait(1)
		
			for i=13,4,-0.3 do
			
		
            blockChosen.CFrame=CFrame.new(blockChosen.Position.x,blockChosen.Position.y-1.1,blockChosen.Position.z)
            blockChosen2.CFrame=CFrame.new(blockChosen2.Position.x,blockChosen2.Position.y-1.1,blockChosen2.Position.z)
			wait(0.1)
			
			  end
	          table.remove(jumparts,ranNum1)
	
            table.remove(jumparts,ranNum2)

                 local ranNum1=math.random(1,#jumparts)

                  local ranNum2=ranNum1

            while ranNum1==ranNum2 do
	
	           ranNum2=math.random(1,#jumparts)
	
	           wait()
             end
         end
       end
	end
	 script.Parent.BrickColor=BrickColor.new("Lime green")
	enabled=true

end     
enabled=true



function onClicked()
	 ranNum()
end 


script.Parent.ClickDetector.MouseClick:connect(onClicked)

I fixed it i need to add blockChosen=jumparts[ranNum1]   blockChosen2=jumparts[ranNum2]

after the while loop.

jumparts={}
for i,v in pairs(game.Workspace.jumparts:GetChildren())do
	table.insert(jumparts,i,v)
end
function ranNum()
local ranNum1=math.random(1,#jumparts)
local ranNum2=ranNum1


while ranNum1==ranNum2 do
	ranNum2=math.random(1,#jumparts)
	wait()
 end

 local blockChosen=jumparts[ranNum1]
 local blockChosen2=jumparts[ranNum2]


	if enabled==true then
		
		enabled=false
		
		 script.Parent.BrickColor=BrickColor.new("Really red")
		
	
	
     
      
	for i,v in pairs(jumparts)do
		
      while true do   
	 
		for i=4,13,0.3 do
			
		blockChosen.CFrame=CFrame.new(blockChosen.Position.x,blockChosen.Position.y+1.1,blockChosen.Position.z)
		blockChosen2.CFrame=CFrame.new(blockChosen2.Position.x,blockChosen2.Position.y+1.1,blockChosen2.Position.z)
			wait(0.1)
			
		 end
		     
		wait(1)
		
			for i=13,4,-0.3 do
			
		
            blockChosen.CFrame=CFrame.new(blockChosen.Position.x,blockChosen.Position.y-1.1,blockChosen.Position.z)
            blockChosen2.CFrame=CFrame.new(blockChosen2.Position.x,blockChosen2.Position.y-1.1,blockChosen2.Position.z)
			wait(0.1)
			
			  end
			
	          table.remove(jumparts,ranNum1)
	
              table.remove(jumparts,ranNum2)

                 local ranNum1=math.random(1,#jumparts)

                  local ranNum2=ranNum1

            while ranNum1==ranNum2 do
	
	           ranNum2=math.random(1,#jumparts)
	
	           wait()
             end
             blockChosen=jumparts[ranNum1]
             blockChosen2=jumparts[ranNum2]
         end
       end
	end
	 script.Parent.BrickColor=BrickColor.new("Lime green")
	enabled=true

end     
enabled=true



function onClicked()
	 ranNum()
end 


script.Parent.ClickDetector.MouseClick:connect(onClicked)