I tried one belt each, of what I need to get to purple science. But I goofed, and didn’t extend the Stone belt where the Stone Bricks belt went, so I had to squeeze it in. D’oh!

So, at this stage of the game, I have (from left to right):
- Low Density Structures
- Blue Circuits
- Batteries
- Sulfur
- Iron Plates (this belt should probably be four belts wide)
- Copper Plates (this belt should probably be four belts wide, or perhaps two)
- Green Circuits
- Steel Plates (this belt should probably be two belts wide)
- Stone Bricks
- Stone Ore
- Coal
- Plastic
- Red Circuits
So, in order of appearance, they went like this:
I should note that as I laid down my template of which resources would be in which belt lane, (when the research let let) I created Constant Combinators with the item to go on the belt. Factorio did not display which item, until I went to Settings –> Interface –> Show Combinator Settings in alt-mode
- Iron Plates
- Feeds green circuits
- Feeds red and green science
- Copper Plates
- Feeds green circuits
- Feeds red and green science
- Green Circuits
- Feeds red and green science
- Steel Plates
- Feeds Big Mall by SwaggoFlamingo – although I think I would like a more complete mall
- Coal
- Turns out Big Mall by SwaggoFlamingo needs stone bricks, so I built a smelter nearby, which needed coal
- Next up was black science, which needed coal and stone bricks, too
- Later, Plastic will need coal
- Stone Bricks
- Feeds black science
- Plastic
- Feeds red circuits
- Red Circuits
- Feeds blue science
- Sulfur
- Feeds sulfuric acid, which is needed for batteries
- Batteries
- Feeds yellow science
- Blue Circuits
- Feeds yellow science
- Low Density Structures
- Feeds yellow science
- Stone Ore
- Feeds purple science
Build order
- starter Iron mining and smelting
- starter Copper mining and smelting
- starter Stone drilling
- Starter base with red science, yellow belts and green circuits
- Electricity generation
- Boiler
- Offshore pump
- Steam engines
- Burner inserter
- Wooden box to store coal in, until a belt of coal can be delivered
- Small electric poles
- Iron mining (electric miners)
- Copper mining (electric miners)
- Coal mining (electric miners)
- Iron smelting
- Copper smelting
- Steel smelting
- Lay out main bus
- Green circuits
- Red and Green science
- Research Electric Energy distribution 1 to get steel towers
- Science labs
- Bolster electric mining and attach output to main bus
- Black Science
- Do not us Mike’s Mall – Yellow – I started with this, only to find that the factory that builds Medium Electric Pole and Big Electric Pole was missing the iron stick ingredient, and there was not a good space to add a factory which reached the iron plates belt line.
- Now I’m going to try Kitch’s Totally Practical Strip Mall – 3.0 (0.17 Update)
The other thing I did was combine the Unload 4 red train station by Nilaus with a medium buffer by Shaderon (which I doubled to do four lanes). The blueprint is here: