diff --git a/.gitignore b/.gitignore
index d346f76..53d923c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 *.so
 *.o
-*.c
+*.deb
 bin/**
diff --git a/src/localthread.c b/src/localthread.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..0d09eed
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,58 @@
+//=-------------------------------------------------------------------------=//
+//  Main                                                                     //
+//                                                                           //
+//  Copyright © 2021 The Gem-graph Project                                   //
+//                                                                           //
+//  This file is part of gem-graph.                                          //
+//                                                                           //
+//  This program is free software: you can redistribute it and/or modify     //
+//  it under the terms of the GNU Affero General Public License as           //
+//  published by the Free Software Foundation, either version 3 of the       //
+//  License, or (at your option) any later version.                          //
+//                                                                           //
+//  This program is distributed in the hope that it will be useful,          //
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of           //
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            //
+//  GNU Affero General Public License for more details.                      //
+//                                                                           //
+//  You should have received a copy of the GNU Affero General Public License //
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.   //
+//=-------------------------------------------------------------------------=//
+
+#include <pthread.h>
+#include <stdio.h>
+#include <malloc.h>
+#include "types.h"
+#include "server.h"
+#include "scheduler.h"
+
+
+#define ARROW_NUMBER 150
+#define MAX_CYCLES 40000
+#define SPACE_SIZE 10000
+#define MAX_THREAD 0
+
+
+int main(int argc, char **argv)
+{
+    BoolArray_t *globalPreemptionSpace = NULL;
+    IntArray_t *globalDrawingSpace = NULL;
+    IntArray_t *arrowList = NULL;
+    IntArray_t *transitionTree = NULL;
+
+    globalPreemptionSpace = (BoolArray_t*) malloc(sizeof(BoolArray_t));
+    globalPreemptionSpace->space = (bool*) malloc(sizeof(bool)*SPACE_SIZE);
+    globalPreemptionSpace->size = SPACE_SIZE;
+
+    globalDrawingSpace = (IntArray_t*) malloc(sizeof(IntArray_t));
+    globalDrawingSpace->space = (int*) malloc(sizeof(int)*SPACE_SIZE);
+    globalDrawingSpace->size = SPACE_SIZE;
+
+    arrowList = (IntArray_t*) malloc(sizeof(IntArray_t));
+    arrowList->space = (int*) malloc(sizeof(int)*ARROW_NUMBER);
+    arrowList->size = ARROW_NUMBER;
+    
+    printf("globalPreemptionSpace: %p, size: %d\n", globalPreemptionSpace, globalDrawingSpace->size);
+    printf("globalDrawingSpace: %p, size: %d\n", globalDrawingSpace, globalDrawingSpace->size);
+    printf("arrowList: %p, size: %d\n", arrowList, arrowList->size);
+}
diff --git a/src/scheduler.c b/src/scheduler.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/server.c b/src/server.c
new file mode 100644
index 0000000..e69de29