quickstart/logic introductionish guide

docs/logic/4-quickstart.md

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+>  How Can I Get Started With Logic?
+>  
+
+(insert proper introduction here)
+
+
+### Section 1: Print & Print Flush
+
+We begin with the basics:
+
+1) Place a processor (any type wil work).
+2) Place a message block nearby.
+3) Click on the processor - its range and a write button will pop up.
+4) Click on the message box while the overlay is open: it should say `message1` above it.
+
+![image](https://user-images.githubusercontent.com/45698812/115095955-13f6d480-9ed8-11eb-90d9-e2f3f7e1ba8a.png)
+
+5) Click the write button below the processor. 
+6) Click the `Add` button then click `Print`.
+8) Enter `"Hello World!"` into the box - make sure that there are double quotes.
+9) Click `Add` again and select `Print Flush`.
+10) Exit out - you should see "Hello World!" in the message block!
+
+![image](https://user-images.githubusercontent.com/45698812/115096044-6cc66d00-9ed8-11eb-85fe-59315e2c46b6.png)
+
+Congrats, you just wrote your first program!
+Let's get some other commands involved.
+
+### Section 2: Sensor & Control
+
+Printing is great, but the greatest power in using logic comes in being able to control the world around you
+
+1) Remove the code in the processor
+2) Place a door and a switch near the processor
+3) Click `Add` and select `Sensor`
+4) The default parameters are `result`, `@copper`, and `block1`
+5) Delete `@copper` and replace it with `@enabled`
+6) Delete `block1` and replace it with `switch1`
+* as the name implies, sensor can *sensor* information from the outside world
+* this code will read the state (`@enabled`) of the switch (`@switch1`) and put it into a variable named `result`
+7) Click `Add` and select `Control`
+8) Delete `block1` and replace it with `door1`
+9) Delete `0` and replace it with `result`
+10) Exit out - clicking the switch should now toggle the door!
+
+### Section 3: Radar
+TODO
+
+
+(below should probably be split into a separate file, but i just want to lay out a general order of things)
+
+### Section 4: Get Link
+### Section 5: Set and Operation
+### Section 6: Draw & Drawflush
+### Section 7: Jump & End
+### Section 8: Unit Control
+### Section 9: Misc.
+oddities e.g.
+en/disabled sorter behavior, @counter
+
+
+### Further Reading
+- link to glossary
+- list of mods
+- other guides