diff --git a/MASTER.ino b/MASTER.ino
index 24ad964..a4d4b69 100644
--- a/MASTER.ino
+++ b/MASTER.ino
@@ -73,3 +73,78 @@ void loop() {
   }
   
 }
+
+size_t display_all_clear(char color, uint8_t* buffer){
+    buffer[0]=0x01;
+    buffer[1]=color;
+    buffer[2]=crc8(&buffer[0], 2);
+return 3; 
+}
+
+size_t display_set_page(char point, uint8_t* buffer){
+    buffer[0]=0x02;
+    buffer[1]=point;
+    buffer[2]=crc8(&buffer[0], 2);
+return 3; 
+}
+
+size_t display_add_simbol(char* str, size_t str_len, uint8_t* buffer){
+    size_t idx;
+    buffer[idx]=0x04;
+    idx++;
+   for(int si=0; i<str_len; i++) {
+    buffer[idx]=str;
+    idx++;
+  }
+  buffer[idx]=crc8(&buffer[0], idx);
+  idx++;
+return idx; 
+}
+
+size_t display_del_simbol(char number, uint8_t* buffer){
+    buffer[0]=0x05;
+    buffer[1]=number;
+    buffer[2]=crc8(&buffer[0], 2);
+return 3; 
+}
+
+size_t display_draw_pixel(char x,char y, char color, uint8_t* buffer){
+    buffer[0]=0x06;
+    buffer[1]=x;
+    buffer[2]=y;
+    buffer[3]=color;
+    buffer[4]=crc8(&buffer[0], 4);
+return 5; 
+}
+
+size_t display_draw_line(char x1,char y1, char x2, char y2, char color, uint8_t* buffer){
+    buffer[0]=0x07;
+    buffer[1]=x1;
+    buffer[2]=y1;
+    buffer[3]=x2;
+    buffer[4]=y2;
+    buffer[5]=color;
+    buffer[6]=crc8(&buffer[0], 6);
+return 7; 
+}
+
+size_t display_draw_circle(char x,char y, char r, char color, uint8_t* buffer){
+    buffer[0]=0x08;
+    buffer[1]=x;
+    buffer[2]=y;
+    buffer[3]=r;
+    buffer[4]=color;
+    buffer[5]=crc8(&buffer[0], 5);
+return 6; 
+}
+
+size_t display_draw_rectangle(char x,char y, char height, char width, char color, uint8_t* buffer){
+    buffer[0]=0x09;
+    buffer[1]=x;
+    buffer[2]=y;
+    buffer[3]=height;
+    buffer[4]=widht;
+    buffer[5]=color;
+    buffer[6]=crc8(&buffer[0], 6);
+return 7; 
+}