diff --git a/projects/04/tests/Flip.asm b/projects/04/tests/Flip.asm
new file mode 100644
index 0000000..c43c084
--- /dev/null
+++ b/projects/04/tests/Flip.asm
@@ -0,0 +1,29 @@
+//Flip.asm
+//flips the values of RAM[0] and RAM[1]
+
+//temp=R1
+//R1=R0
+//R0=temp
+
+@R1
+D=M
+@temp   // Variable
+M=D     // temp = R1
+
+@R0
+D=M
+@R1
+M=D     // R1 = R0
+
+@temp
+D=M
+@R0
+M=D  // R0 = temp
+
+(END)
+@END
+0;JMP
+
+//@temp --> find some available memory register (register n)
+//and use it to represent the variable temp. So, from now on, each
+//occurance of @temp in the program will be translated into @n
\ No newline at end of file
diff --git a/projects/04/tests/Frage.txt b/projects/04/tests/Frage.txt
new file mode 100644
index 0000000..dbac032
--- /dev/null
+++ b/projects/04/tests/Frage.txt
@@ -0,0 +1,4 @@
+How would a assembler distinguish between a branching symbol and a variable symbol?
+Wie würde ein Assembler zwischen einem Verzweigungssymbol und einem variablen Symbol unterscheiden?
+
+A branching symbol has a label declaration somewhere in the program, and a variable symbol doesn't