diff --git a/projects/08/FunctionCalls/FibonacciElement/FibonacciElement.asm b/projects/08/FunctionCalls/FibonacciElement/FibonacciElement.asm
new file mode 100644
index 0000000..ada39c6
--- /dev/null
+++ b/projects/08/FunctionCalls/FibonacciElement/FibonacciElement.asm
@@ -0,0 +1,370 @@
+@256 // init starts
+D=A
+@SP
+M=D // initialized SP to 256
+@300
+D=A
+@LCL
+M=D // initialized @LCL to 300
+@400
+D=A
+@ARG
+M=D // initialized @ARG to 400, init ends
+@Sys.init
+0;JMP
+(Main.fibonacci) // function Main.fibonacci 0
+@ARG
+A=M
+D=M
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push argument 0 (L1)
+@2 // push constant 2
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push constant 2 (L2)
+@SP // ==== lt ====
+A=M-1
+D=M
+A=A-1
+D=M-D
+M=0
+M=M-1
+@43
+D;JLT
+@SP
+A=M-1
+A=A-1
+M=0
+@SP
+M=M-1 // end lt (L3)
+@SP
+AM=M-1
+D=M
+@Main.fibonacciIF_TRUE
+D;JNE // end if-goto IF_TRUE (L4)
+@Main.fibonacciIF_FALSE
+0;JMP // end goto IF_FALSE (L5)
+(Main.fibonacciIF_TRUE) // end label IF_TRUE (L6)
+@ARG
+A=M
+D=M
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push argument 0 (L7)
+@SP
+A=M-1
+D=M
+@ARG
+A=M
+M=D
+@ARG
+D=M+1
+@SP
+M=D // @SP = ARG+1
+@LCL
+D=M
+@R13
+M=D // Save LCL to R13
+A=D-1 // A=*LCL-1
+D=M // D=*(*LCL-1)
+@THAT // A=THAT
+M=D   // *that = *(*lcl-1)
+@R13
+A=M-1
+A=A-1 // A=*LCL-2
+D=M // D=*(*LCL-2)
+@THIS // A=THIS
+M=D   // *THIS = *(*lcl-2)
+@R13
+A=M-1
+A=A-1
+A=A-1 // A=*LCL-3
+D=M // D=*(*LCL-3)
+@ARG // A=ARG
+M=D   // *ARG = *(*lcl-3)
+@R13
+A=M-1
+A=A-1
+A=A-1
+A=A-1 // A=*LCL-4
+D=M // D=*(*LCL-4)
+@LCL // A=LCL
+M=D   // *LCL = *(*lcl-4)
+@R13
+A=M-1
+A=A-1
+A=A-1
+A=A-1
+A=A-1 // A=*LCL-5
+A=M  // A=*(*LCL-5)
+0;JMP // Jump to *(LCL-5)
+(Main.fibonacciIF_FALSE) // end label IF_FALSE (L9)
+@ARG
+A=M
+D=M
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push argument 0 (L10)
+@2 // push constant 2
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push constant 2 (L11)
+@SP // ==== sub ====
+A=M-1
+D=M
+A=A-1
+M=M-D
+@SP
+M=M-1 // end sub (L12)
+@5fd25fdab54b4bfd5a91536ecfd6806e
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1
+@LCL // Read @LCL to A
+D=M // Put @LCL to D
+@SP
+A=M
+M=D // Save @LCL to SP
+@SP
+M=M+1
+@ARG // Read @ARG to A
+D=M // Put @ARG to D
+@SP
+A=M
+M=D // Save @ARG to SP
+@SP
+M=M+1
+@THIS // Read @THIS to A
+D=M // Put @THIS to D
+@SP
+A=M
+M=D // Save @THIS to SP
+@SP
+M=M+1
+@THAT // Read @THAT to A
+D=M // Put @THAT to D
+@SP
+A=M
+M=D // Save @THAT to SP
+@SP
+M=M+1
+@SP
+D=M
+@LCL
+M=D
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+@ARG
+M=D
+@Main.fibonacci // Jump to Main.fibonacci
+0;JMP
+(5fd25fdab54b4bfd5a91536ecfd6806e) // return back from function here
+@ARG
+A=M
+D=M
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push argument 0 (L14)
+@1 // push constant 1
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push constant 1 (L15)
+@SP // ==== sub ====
+A=M-1
+D=M
+A=A-1
+M=M-D
+@SP
+M=M-1 // end sub (L16)
+@a954c9cff71cdccc09f4338e60df6394
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1
+@LCL // Read @LCL to A
+D=M // Put @LCL to D
+@SP
+A=M
+M=D // Save @LCL to SP
+@SP
+M=M+1
+@ARG // Read @ARG to A
+D=M // Put @ARG to D
+@SP
+A=M
+M=D // Save @ARG to SP
+@SP
+M=M+1
+@THIS // Read @THIS to A
+D=M // Put @THIS to D
+@SP
+A=M
+M=D // Save @THIS to SP
+@SP
+M=M+1
+@THAT // Read @THAT to A
+D=M // Put @THAT to D
+@SP
+A=M
+M=D // Save @THAT to SP
+@SP
+M=M+1
+@SP
+D=M
+@LCL
+M=D
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+@ARG
+M=D
+@Main.fibonacci // Jump to Main.fibonacci
+0;JMP
+(a954c9cff71cdccc09f4338e60df6394) // return back from function here
+@SP // ==== add ====
+A=M-1
+D=M
+A=A-1
+M=D+M
+@SP
+M=M-1 // end add (L18)
+@SP
+A=M-1
+D=M
+@ARG
+A=M
+M=D
+@ARG
+D=M+1
+@SP
+M=D // @SP = ARG+1
+@LCL
+D=M
+@R13
+M=D // Save LCL to R13
+A=D-1 // A=*LCL-1
+D=M // D=*(*LCL-1)
+@THAT // A=THAT
+M=D   // *that = *(*lcl-1)
+@R13
+A=M-1
+A=A-1 // A=*LCL-2
+D=M // D=*(*LCL-2)
+@THIS // A=THIS
+M=D   // *THIS = *(*lcl-2)
+@R13
+A=M-1
+A=A-1
+A=A-1 // A=*LCL-3
+D=M // D=*(*LCL-3)
+@ARG // A=ARG
+M=D   // *ARG = *(*lcl-3)
+@R13
+A=M-1
+A=A-1
+A=A-1
+A=A-1 // A=*LCL-4
+D=M // D=*(*LCL-4)
+@LCL // A=LCL
+M=D   // *LCL = *(*lcl-4)
+@R13
+A=M-1
+A=A-1
+A=A-1
+A=A-1
+A=A-1 // A=*LCL-5
+A=M  // A=*(*LCL-5)
+0;JMP // Jump to *(LCL-5)
+(Sys.init) // function Sys.init 0
+@4 // push constant 4
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1 // end push constant 4 (L21)
+@dd19df789547baebfea110998cdf5713
+D=A
+@SP
+A=M
+M=D
+@SP
+M=M+1
+@LCL // Read @LCL to A
+D=M // Put @LCL to D
+@SP
+A=M
+M=D // Save @LCL to SP
+@SP
+M=M+1
+@ARG // Read @ARG to A
+D=M // Put @ARG to D
+@SP
+A=M
+M=D // Save @ARG to SP
+@SP
+M=M+1
+@THIS // Read @THIS to A
+D=M // Put @THIS to D
+@SP
+A=M
+M=D // Save @THIS to SP
+@SP
+M=M+1
+@THAT // Read @THAT to A
+D=M // Put @THAT to D
+@SP
+A=M
+M=D // Save @THAT to SP
+@SP
+M=M+1
+@SP
+D=M
+@LCL
+M=D
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+D=D-1
+@ARG
+M=D
+@Main.fibonacci // Jump to Main.fibonacci
+0;JMP
+(dd19df789547baebfea110998cdf5713) // return back from function here
+(Sys.initWHILE) // end label WHILE (L23)
+@Sys.initWHILE
+0;JMP // end goto WHILE (L24)
+@369
+0;JMP
diff --git a/projects/08/FunctionCalls/FibonacciElement/FibonacciElement.out b/projects/08/FunctionCalls/FibonacciElement/FibonacciElement.out
new file mode 100644
index 0000000..546d784
--- /dev/null
+++ b/projects/08/FunctionCalls/FibonacciElement/FibonacciElement.out
@@ -0,0 +1,2 @@
+| RAM[0] |RAM[261]|
+|    257 |      0 |
diff --git a/projects/08/ProgramFlow/FibonacciSeries/FibonacciSeries.asm b/projects/08/ProgramFlow/FibonacciSeries/FibonacciSeries.asm
index 91ca140..6a8c02d 100644
--- a/projects/08/ProgramFlow/FibonacciSeries/FibonacciSeries.asm
+++ b/projects/08/ProgramFlow/FibonacciSeries/FibonacciSeries.asm
@@ -10,6 +10,8 @@ M=D // initialized @LCL to 300
 D=A
 @ARG
 M=D // initialized @ARG to 400, init ends
+@Sys.init
+0;JMP
 @ARG // argument 1
 D=M
 @1 // write 1 to A
@@ -204,5 +206,5 @@ M=D // end pop argument 0 (L26)
 @__GLOBAL__.MAIN_LOOP_START
 0;JMP // end goto MAIN_LOOP_START (L27)
 (__GLOBAL__.END_PROGRAM) // end label END_PROGRAM (L28)
-@207
+@209
 0;JMP
diff --git a/vm/CodeWriter.php b/vm/CodeWriter.php
index 3ca924c..4afdf10 100644
--- a/vm/CodeWriter.php
+++ b/vm/CodeWriter.php
@@ -112,6 +112,77 @@ class CodeWriter {
     }
   }
 
+  /**
+   * Function call executed, save state and JUMP
+   */
+  public function writeCall(String $functionName, $numArgs) {
+
+    $label = bin2hex(random_bytes(16));
+
+    // push the label to top of the stack
+    $this->write([
+      "@$label",
+      "D=A",
+      "@SP",
+      "A=M",
+      "M=D",
+      "@SP",
+      "M=M+1"
+    ]);
+
+    $pushes = [
+      "@LCL",
+      "@ARG",
+      "@THIS",
+      "@THAT",
+    ];
+
+    // TODO: optimize this by saving LCL, ARG
+    // then doing the SP-n-5 calculation (since that will be much faster)
+    // and then updating ARG
+    foreach ($pushes as $lookupRegister) {
+      $this->write([
+        "$lookupRegister // Read $lookupRegister to A",
+        "D=M // Put $lookupRegister to D",
+        "@SP",
+        "A=M",
+        "M=D // Save $lookupRegister to SP",
+        "@SP",
+        "M=M+1",
+      ]);
+    }
+
+    // Load current stackpointer to D
+    $this->write([
+      "@SP",
+      "D=M",
+    ]);
+
+    // Write current stackpointer to LCL
+    $this->write([
+      "@LCL",
+      "M=D",
+    ]);
+
+    // Reduce D height times = numArgs+5
+    $height = $numArgs + 5;
+    for ($i=0; $i < $height; $i++) {
+      $this->write([
+        "D=D-1",
+      ]);
+    }
+
+    // now D = SP-n-5
+    // now we need to write D to ARG
+    $this->write([
+      "@ARG",
+      "M=D",
+      "@$functionName // Jump to $functionName",
+      "0;JMP",
+      "($label) // return back from function here",
+    ]);
+  }
+
   /**
    * Writes the preable to initialize the VM
    */
diff --git a/vm/VMTranslator.php b/vm/VMTranslator.php
index eb7e14d..c867c15 100644
--- a/vm/VMTranslator.php
+++ b/vm/VMTranslator.php
@@ -72,6 +72,12 @@ class VMTranslator {
             $this->writer->writeReturn();
             break;
 
+          case CommandType::CALL:
+            $functionName = $parser->arg1();
+            $numberOfArgs = $parser->arg2();
+            $this->writer->writeCall($functionName, $numberOfArgs);
+            break;
+
           default:
             throw new \Exception("Not Implemented $command", 1);
             break;