diff --git a/platformio.ini b/platformio.ini
index 4e203d9..2adc984 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -8,6 +8,9 @@
 ; Please visit documentation for the other options and examples
 ; http://docs.platformio.org/page/projectconf.html
 
+[platformio]
+env_default = leonardo
+
 [env:attiny2313]
 platform = atmelavr
 board = attiny2313
@@ -18,4 +21,9 @@ upload_protocol = stk500v1
 upload_flags = -P$UPLOAD_PORT -b$UPLOAD_SPEED
 ; values
 upload_port = /dev/ttyUSB0
-upload_speed = 19200
\ No newline at end of file
+upload_speed = 19200
+
+[env:leonardo]
+platform = atmelavr
+board = leonardo
+framework = arduino
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index de7b395..3e9d52a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,9 +1,88 @@
 #include <Arduino.h>
 
+/*
+for cheap Chinese 64 dots LED-Projector
+
+Board has unmarked chip in socket - pin layout fits to ATTiny 2313 an 4313
+the LEDS are connected to 8 pcs 74HC595
+
+
+           --u--
+RST      1       20  VCC
+NC  (0)  2       19  (16) IN  SCK
+NC  (1)  3       18  (15) IN  MISO
+XTAL     4       17  (14) IN  MOSI
+XTAL     5       16  (13) IN
+OUT (4)  6       15  (12) IN
+OUT (5)  7       14  (11) IN
+OUT (6)  8       13  (10) IN
+NC  (7)  9       12  (9)  MIC
+GND     10       11  (8)  IN
+           -----
+
+()   = Arduino Pins
+RST  = Reset - 10K to GND, 10uF to VCC
+XTAL = 16 MHz Crystal
+IN   = switches
+MIC  = Input from microphone amplifier (LM358)
+
+
+*/
+
+#define LATCHPIN 6
+#define DATAPIN 4
+#define CLOCKPIN 5
+byte ledsData[8];
+
+byte currentled = 0;
+
+void clear() {
+  for (int i=0; i < 8; i++) {
+    // low is led on
+    ledsData[i] = 255;
+  }
+}
+
+void writebuffer(byte ledNr) {
+  byte chipNr = ledNr / 8;
+  byte pinNr = ledNr % 8;
+  if(chipNr < 8) {
+    bitWrite(ledsData[chipNr], pinNr, LOW);
+  }
+}
+
+void writexy(byte x, byte y) {
+  byte lednr = x*8 + y;
+  writebuffer(lednr);
+}
+
+void pushout() {
+  digitalWrite(LATCHPIN, LOW);
+  for(int i = 8-1; i>=0; i--) {
+      shiftOut(DATAPIN, CLOCKPIN, MSBFIRST, ledsData[i]);
+  }
+  digitalWrite(LATCHPIN, HIGH);
+}
+
 void setup() {
-    // put your setup code here, to run once:
+  pinMode(LATCHPIN, OUTPUT);
+  pinMode(DATAPIN, OUTPUT);
+  pinMode(CLOCKPIN, OUTPUT);
+
+  clear();
+  pushout();
+
 }
 
 void loop() {
-    // put your main code here, to run repeatedly:
-}
\ No newline at end of file
+  clear();
+  writebuffer(currentled);
+
+  pushout();
+
+  currentled++;
+  if (currentled >=64) {
+    currentled = 0;
+  }
+  delay(100);
+}