Created Building a Classic MacOS app (markdown)

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+This tutorial assumes that [you've set up mpw already](Getting-Started).
+
+# Building the standard SillyBalls example that comes with MPW
+
+Create a folder named `mpw-sillyballs` to hold your project (you can choose any name here, but that's what we'll call it going forward).
+
+## Obtain the C source code
+
+Find the `SillyBalls.c` example. For MPW 3.5, it is at `MPW/Examples/CExamples/SillyBalls.c`. Copy it into a the `mpw-sillyballs` folder.
+
+## Creating a resource file
+
+Every application on classic MacOS needs a few resources that describe the application and its UI. Those are usually defined in a resource file. You can create this resource file in a text description language named `Rez`. We'll create a minimal resource file named `SillyBalls.r` that just tells the operating system about our application's abilities:
+
+```Rez
+#include <SysTypes.r>
+#include <Types.r>
+
+/* here is the quintessential MultiFinder friendliness device, the SIZE resource */
+
+resource 'SIZE' (-1) {
+	dontSaveScreen,
+	acceptSuspendResumeEvents,
+	enableOptionSwitch,
+	canBackground,                  /* we can background; we don't currently, but our sleep value */
+                                        /* guarantees we don't hog the Mac while we are in the background */
+	multiFinderAware,               /* this says we do our own activate/deactivate; don't fake us out */
+	backgroundAndForeground,        /* this is definitely not a background-only application! */
+	dontGetFrontClicks,             /* change this if you want "do first click" behavior like the Finder */
+	ignoreChildDiedEvents,          /* essentially, I'm not a debugger (sub-launching) */
+	is32BitCompatible,              /* this app is safe to run in 32-bit address space */
+	reserved,
+	reserved,
+	reserved,
+	reserved,
+	reserved,
+	reserved,
+	reserved,
+	23 * 1024,        /* 23k Preferred max. RAM */
+	35 * 1024	  /* 35k Minimal RAM limit */
+};
+```
+
+### Create the Makefile for building this app
+
+```
+# This should point to wherever you've built the 'mpw' tool from this repository:
+MPW=~/Programming/mpw/build/bin/mpw
+
+RINCLUDES=~/mpw/Interfaces/RIncludes
+
+# 'SILB' is the unique "creator code" for this Silly Balls app, and used to associate icons
+# with the app and its documents, and tell Finder to use this app to open a file. Make up
+# your own unique 4-character code for your app here.
+LDFLAGS =-w -c 'SILB' -t APPL \
+	-sn STDIO=Main -sn INTENV=Main -sn %A5Init=Main
+
+PPC_LDFLAGS =-m main -w -c 'SILB' -t APPL
+
+LIBRARIES={Libraries}Stubs.o \
+	{Libraries}MacRuntime.o \
+	{Libraries}IntEnv.o \
+	{Libraries}Interface.o \
+	{Libraries}ToolLibs.o \
+	{CLibraries}StdCLib.o
+
+PPC_LIBRARIES={SharedLibraries}InterfaceLib \
+	{SharedLibraries}StdCLib \
+	{PPCLibraries}StdCRuntime.o \
+	{PPCLibraries}PPCCRuntime.o
+
+TOOLBOXFLAGS=-d OLDROUTINENAMES=1 -typecheck relaxed
+
+SOURCES=SillyBalls.c
+
+OBJECTS=$(SOURCES:%.c=obj/%.68k.o)
+PPC_OBJECTS=$(SOURCES:%.c=obj/%.ppc.o)
+
+RFILES=SillyBalls.r Size.r
+EXECUTABLE=SillyBalls
+
+all: prepass bin/$(EXECUTABLE).ppc bin/$(EXECUTABLE).68k
+
+prepass:
+	mkdir -p obj bin
+
+bin/$(EXECUTABLE).ppc: $(PPC_OBJECTS)
+	$(MPW) PPCLink $(PPC_LDFLAGS) $(PPC_OBJECTS) $(PPC_LIBRARIES) -o $@; \
+	Rez -rd $(RFILES) -o $@ -i $(RINCLUDES) -append
+
+bin/$(EXECUTABLE).68k: $(OBJECTS)
+	$(MPW) link $(LDFLAGS) $(OBJECTS) $(LIBRARIES) -o $@
+	Rez -rd $(RFILES) -o $@ -i $(RINCLUDES) -append
+
+obj/%.68k.o : %.c
+	$(MPW) SC $(TOOLBOXFLAGS) $< -o $@
+
+obj/%.ppc.o : %.c
+	$(MPW) MrC $(TOOLBOXFLAGS) $< -o $@; \
+
+clean:
+	rm -rf bin obj
+```
+
+### Building the app
+
+Just type `make all` in your `mpw-sillyballs` directory. The Makefile will now create a `bin/SillyBalls.68k` and a `bin/SillyBalls.ppc` executable.