diff --git a/src/main.c b/src/main.c
index 2b4b4d5..99ce08a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,13 @@
 #include <stdio.h>
-#include <stdio.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
+#include <stdlib.h>
+
+#ifdef __linux__
+    #include <sys/ioctl.h>
+    #include <unistd.h>
+#elif _WIN32
+    #include <windows.h>
+    #include <conio.h>
+#endif
 
 // import sub programme
 #include "test_prog.h"
@@ -15,8 +21,29 @@ Version: 0.1
 Datum: 04.12.2024
 Änderungen:
 0.1 04.12.2024 Dokument erstellt
+0.2 09.12.2024 Willkommensnachricht
 */
 
+#ifdef __linux__
+void get_terminal_size_linux(int argc, char **argv, int *width, int *height){
+    struct winsize w;
+    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+
+    *height = w.ws_row;
+    *width = w.ws_col;
+}
+
+#elif _WIN32
+void get_terminal_size_windows(int argc, char **argv, int *width, int *height){
+    CONSOLE_SCREEN_BUFFER_INFO csbi;
+    int columns, rows;
+
+    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
+    *width = csbi.srWindow.Right - csbi.srWindow.Left + 1;
+    *height = csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
+}
+#endif
+
 void print_wellcome_line(char line[100], int spaces){
     for(int i = 0; i < spaces; i++){
         printf(" ");
@@ -24,14 +51,30 @@ void print_wellcome_line(char line[100], int spaces){
     printf("%s\n", line);
 }
 
-void print_wellcome(int terminal_with, int terminal_higt){
-    printf("\e[1;1H\e[2J");
+void clear_terminal(){
+    #ifdef __linux__
+        printf("\e[1;1H\e[2J");
+    #elif _WIN32
+        system("cls");
+    #endif
+}
 
-    for(int i = 0; i < (terminal_higt - 10) / 2; i++){
+void sleep_universal(int t){
+    #ifdef __linux__
+        sleep(t);
+    #elif _WIN32
+        Sleep(t * 1000);
+    #endif
+}
+
+void print_wellcome(int terminal_width, int terminal_height){
+    clear_terminal();
+
+    for(int i = 0; i < (terminal_height - 10) / 2; i++){
         printf("\n");
     }
 
-    int spaces = (terminal_with - 83) / 2;
+    int spaces = (terminal_width - 83) / 2;
     print_wellcome_line("__        ___ _ _ _                                                                        ", spaces);
     print_wellcome_line("\\ \\      / (_) | | | _____  _ __ ___  _ __ ___   ___ _ __      _____   _ _ __ ___        ", spaces);
     print_wellcome_line(" \\ \\ /\\ / /| | | | |/ / _ \\| '_ ` _ \\| '_ ` _ \\ / _ \\ '_ \\    |_  / | | | '_ ` _ \\", spaces);
@@ -44,7 +87,7 @@ void print_wellcome(int terminal_with, int terminal_higt){
     print_wellcome_line("|  __/| | | | (_) | |_| | | | (_) | | | | | (__\\__ \\   |  _  |  __/ |  _|  __/ |         ", spaces);
     print_wellcome_line("|_|   |_| |_|\\___/ \\__|_| |_|\\___/|_| |_|_|\\___|___/   |_| |_|\\___|_|_|  \\___|_|     ", spaces);
 
-    sleep(3);
+    sleep_universal(3);
 
     /*
     printf("__        ___ _ _ _                                                                ");
@@ -58,42 +101,38 @@ void print_wellcome(int terminal_with, int terminal_higt){
     printf("| |_) | '_ \ / _ \| __| '_ \ / _ \| '_ \| |/ __/ __|   | |_| |/ _ \ | |_ / _ \ '__|");
     printf("|  __/| | | | (_) | |_| | | | (_) | | | | | (__\__ \   |  _  |  __/ |  _|  __/ |   ");
     printf("|_|   |_| |_|\___/ \__|_| |_|\___/|_| |_|_|\___|___/   |_| |_|\___|_|_|  \___|_|   ");
-
-    printf("__        ___ _ _ _                                                                         \n");
-    printf("\\ \\      / (_) | | | _____  _ __ ___  _ __ ___   ___ _ __      _____   _ _ __ ___         \n");
-    printf(" \\ \\ /\\ / /| | | | |/ / _ \\| '_ ` _ \\| '_ ` _ \\ / _ \\ '_ \\    |_  / | | | '_ ` _ \\ \n");
-    printf("  \\ V  V / | | | |   < (_) | | | | | | | | | | |  __/ | | |    / /| |_| | | | | | |        \n");
-    printf("   \\_/\\_/  |_|_|_|_|\\_\\___/|_| |_| |_|_| |_| |_|\\___|_| |_|   /___|\\__,_|_| |_| |_|   \n");
-    printf("                                                                                            \n");
-    printf(" ____  _           _   _                 _              _   _      _  __                    \n");
-    printf("|  _ \\| |__   ___ | |_| |__   ___  _ __ (_) ___ ___    | | | | ___| |/ _| ___ _ __         \n");
-    printf("| |_) | '_ \\ / _ \\| __| '_ \\ / _ \\| '_ \\| |/ __/ __|   | |_| |/ _ \\ | |_ / _ \\ '__|  \n");
-    printf("|  __/| | | | (_) | |_| | | | (_) | | | | | (__\\__ \\   |  _  |  __/ |  _|  __/ |          \n");
-    printf("|_|   |_| |_|\\___/ \\__|_| |_|\\___/|_| |_|_|\\___|___/   |_| |_|\\___|_|_|  \\___|_|      \n");
     */
-                                                                           
-
-
-
-
-
-
 }
 
 int main(int argc, char **argv){
+    int width = 0;
+    int height = 0;
+    int os = 0;  // 0 == None, 1 = linux, 2 = windows
+
+    // Terminal grösse herauslesen
+    #ifdef __linux__
+        os = 1;
+        get_terminal_size_linux(argc, argv, &width, &height);
+    #elif _WIN32
+        os = 2;
+        get_terminal_size_windows(argc, argv, &width, &height);
+    #endif
+
+    
     // int x = test_gruppe_programmname();
 
-    // int terminal_size();
 
-    struct winsize w;
-    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+    printf ("lines %d\n", height);
+    printf ("columns %d\n", width);
 
-    printf ("lines %d\n", w.ws_row);
-    printf ("columns %d\n", w.ws_col);
+    // neues terminal öffnen (nur linux)
+    system("tput smcup");
 
+    // print wellcome message
+    print_wellcome(width, height);
 
-    print_wellcome(w.ws_col, w.ws_row);
-
+    // zürück zum alten terminal (nur linux)
+    system("tput rmcup");
 
     return 0;
 }