diff --git a/src/main.cpp b/src/main.cpp
index dfd6804..e450a9e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -25,10 +25,20 @@ RST  = Reset - 10K to GND, 10uF to VCC
 XTAL = 16 MHz Crystal
 IN   = switches
 MIC  = Input from microphone amplifier (LM358)
-
-
 */
 
+/*
+   x
+  XXXXXXX
+ XX XXX XX
+XXXXXXXXXXX
+X XXXXXXX X
+X X     X X
+   XX XX
+*/
+
+byte invaderA_1[11] = {112,24,125,182,188,60,188,182,125,24,112};
+
 #define LATCHPIN 5
 #define DATAPIN 4
 #define CLOCKPIN 6
@@ -75,13 +85,36 @@ void setup() {
   pushout();
 }
 
+void drawinvader(int xposition, int yposition) {
+  // TODO yposition
+
+  for (int x=0; x<=11; x++) {
+    int screenx = x+xposition;
+    if (screenx >=0 && screenx < 8) {
+      for (int y=0; y<8; y++) {
+        int screeny = y+yposition;
+        if (screeny >=0 && screeny < 8) {
+          if (bitRead(invaderA_1[x],y) == HIGH ) {
+            writexy(screenx,screeny);
+          }
+        }
+      }
+    }
+  }
+}
+
 
 byte currentcol=1;
 bool direction = true;
 
+int invaderstart = -12;
+int invaderend   = 8;
+int invaderposition = invaderstart;
+
 void loop() {
   clear();
 
+  /*
   // x-line
   for(byte i=0; i<8; i++) {
     writexy(i,currentcol-1);
@@ -90,9 +123,18 @@ void loop() {
   for(byte i=0; i<8; i++) {
     writexy(currentcol-1,i);
   }
+  */
+
+  drawinvader(invaderposition,0);
+
+  invaderposition++;
+  if (invaderposition >=invaderend) {
+    invaderposition = invaderstart;
+  }
 
   pushout();
 
+/*
   if(direction) {
     currentcol++;
   } else {
@@ -106,5 +148,6 @@ void loop() {
     currentcol=2;
     direction = true;
   }
-  delay(100);
+  */
+  delay(300);
 }