Its a set of Tantrix but in micro size (the side is only 10 mm, and the height is just 2 mm)
Design for color change technique.
Its contains 5 color layer. each layer is 0,4 mm height in this version (in the source file you can modify it)
One set is contains only the 1/4 of the pieces what need for the game, and you need to print with four color:

• black (background) 0.4mm height
• color 1 0.4mm height
• color 2 0.4mm height
• color 3 0.4mm height
• black (background) 0.4mm height

for the full set need to print four time:

• Red, Yellow, Green (black)
• Red, Blue, Green (black)
• Red, Yellow, Blue (black)
• Yellow, Green, Blue (black)
  Recommended print in the first layer the dark colors and than the light ones.