diff --git a/cronjob/chart/image_file/image_config.c b/cronjob/chart/image_file/image_config.c
index 0781300..77daea5 100644
--- a/cronjob/chart/image_file/image_config.c
+++ b/cronjob/chart/image_file/image_config.c
@@ -50,7 +50,7 @@ static const config_keyword keywords[] = {
   {"sensor_id",		read_int,               &(img_cfg.sens_id),    			""},
   
 
-  {"bg_color",		read_color,             &(img_cfg.bg_color),    			""},
+  {"bg_color",		read_color,             &(img_cfg.bg_color),   			""},
 
   {"",			NULL, 	  		NULL,					""}
 };
diff --git a/cronjob/chart/image_file/image_data.c b/cronjob/chart/image_file/image_data.c
index 6bf9b8e..86cf298 100644
--- a/cronjob/chart/image_file/image_data.c
+++ b/cronjob/chart/image_file/image_data.c
@@ -17,7 +17,7 @@ static pix_list_ptr min = NULL;
 static pix_list_ptr max = NULL;
 
 
-static pix_list_ptr add_pix_value(pix_list_ptr , int , int );
+static pix_list_ptr add_pix_value(pix_list_ptr , long, int , int );
 static char *get_conn_string();
 static PGconn *pg_check_connect(char *);
 static PGresult *pg_check_exec(PGconn *, char *);
@@ -30,12 +30,12 @@ int scale_y_coords(pix_list_ptr ptr, int c_height, int max_label, int min_label)
   int range            = (max_label - min_label + 1) * 10;				/* Anzahl von 0,1-Schritten */
   double pix_per_scale = ((double)c_height) / ((double)range); 				/* Pixel pro 0,1 */
   pix_list_ptr temp    = ptr;
-  int zero_line        = floor( ((double)max_label) * pix_per_scale);			/* Nullinie */
+  int zero_line        = floor( ((double)( (max_label * 10) + 1)) * pix_per_scale);			/* Nullinie */
   
   DEBUGOUT1("\nBerechne y-Koordinaten:\n");
 
   for (; temp; temp = temp->next){
-    temp->y_pix_coord = floor( ( ((double)temp->value_sum) / ((double)temp->value_count) ) * pix_per_scale);
+    temp->y_pix_coord = -1 * floor( ( ((double)temp->value_sum) / ((double)temp->value_count) ) * pix_per_scale);
     DEBUGOUT3("  neue y-Koordinate: %d bei x: %d\n",temp->y_pix_coord, temp->x_pix_coord);
   }
 
@@ -68,6 +68,7 @@ pix_list_ptr get_pix_list(int c_width){
   int pix_coord;									/* x - Koordinate, an die der Wert gehört */
   int i;										/* Laufvariable zum durchlaufen des Datenbank-resuls */
   long base_time;									/* Zeit an der 0-Koordinate (lt. Datenbank!) */
+  long timestamp;
   pix_list_ptr list_ptr = NULL;								/* Zeiger auf den Anfang der Wertliste */
   pix_list_ptr temp_ptr = NULL;								/* Zeiger zum durchlaufen der Wertliste */
 
@@ -90,9 +91,10 @@ pix_list_ptr get_pix_list(int c_width){
   base_time = atol(PQgetvalue(res, 0, PQfnumber(res, "now"))) - img_cfg.show_interval;
 
   for (i = 0; i < PQntuples(res); i++){
-    time_temp = atol(PQgetvalue(res, i, time_field)) - base_time;
+    timestamp = atol(PQgetvalue(res, i, time_field));
+    time_temp = timestamp - base_time;
     pix_coord = floor( ((double)time_temp) * seconds_per_pix) ;
-    temp_ptr = add_pix_value(temp_ptr, pix_coord, atoi( PQgetvalue(res, i, val_field) ) );
+    temp_ptr = add_pix_value(temp_ptr, timestamp, pix_coord, atoi( PQgetvalue(res, i, val_field) ) );
 
     if (list_ptr == NULL){
       list_ptr = temp_ptr;
@@ -133,36 +135,38 @@ pix_list_ptr get_pix_list(int c_width){
 }
 
 /* Speichert einen geholten Wert ab */
-static pix_list_ptr add_pix_value(pix_list_ptr ptr, int coord, int value){ 
+static pix_list_ptr add_pix_value(pix_list_ptr ptr, long timestamp, int coord, int value){ 
 
   if(ptr == NULL){
     DEBUGOUT1("\nLese Daten ein:\n");
     ptr  		= malloc(sizeof(pix_list_t));
     ptr->next 		= NULL;
-    ptr->x_pix_coord 	= 0;
+    ptr->timestamp	= timestamp;
+    ptr->x_pix_coord 	= coord;
     ptr->y_pix_coord 	= 0;
-    ptr->value_count    = 0;
-    ptr->value_sum	= 0;
-    DEBUGOUT1("  Erstes Element generiert...\n");
-  }
-
-  if(coord == ptr->x_pix_coord){
-    ptr->value_sum += value;
-    ptr->value_count++;
-
-    DEBUGOUT5("  Zu x-pos. %d %d. Wert (%d) hinzugefügt. Durchschn.: %d\n", ptr->x_pix_coord, ptr->value_count, value, (ptr->value_sum/ptr->value_count) );
+    ptr->value_count    = 1;
+    ptr->value_sum	= value;
+    DEBUGOUT3("  Erstes Element generiert...x-pos.: %d Wert: %d\n",ptr->x_pix_coord, ptr->value_sum);
   } else {
-    ptr->next 		= malloc(sizeof(pix_list_t));
-    ptr 		= ptr->next;
-    ptr->x_pix_coord	= coord;
-    ptr->y_pix_coord	= coord;
-    ptr->value_sum 	= value;
-    ptr->value_count 	= 1;
-    ptr->next           = NULL;
 
-    DEBUGOUT3("  An x-pos. %d Wert %d eingefuegt\n", ptr->x_pix_coord, ptr->value_sum);
+    if(coord == ptr->x_pix_coord){
+      ptr->value_sum += value;
+      ptr->value_count++;
+
+      DEBUGOUT5("  Zu x-pos. %d %d. Wert (%d) hinzugefügt. Durchschn.: %d\n", ptr->x_pix_coord, ptr->value_count, value, (ptr->value_sum/ptr->value_count) );
+    } else {
+      ptr->next		= malloc(sizeof(pix_list_t));
+      ptr 		= ptr->next;
+      ptr->timestamp	= timestamp;
+      ptr->x_pix_coord	= coord;
+      ptr->y_pix_coord	= 0;
+      ptr->value_sum 	= value;
+      ptr->value_count 	= 1;
+      ptr->next           = NULL;
+
+      DEBUGOUT3("  An x-pos. %d Wert %d eingefuegt\n", ptr->x_pix_coord, ptr->value_sum);
+    }
   }
-
   return ptr;
 
 }
diff --git a/cronjob/chart/image_file/image_data.h b/cronjob/chart/image_file/image_data.h
index a493f48..78b303a 100644
--- a/cronjob/chart/image_file/image_data.h
+++ b/cronjob/chart/image_file/image_data.h
@@ -8,6 +8,7 @@ typedef struct pix_list {
   int 		y_pix_coord;
   int 		value_count;
   int 		value_sum;
+  long		timestamp;
 } pix_list_t;
 
 
diff --git a/cronjob/chart/image_file/image_draw.c b/cronjob/chart/image_file/image_draw.c
index 04b413a..cf4baec 100644
--- a/cronjob/chart/image_file/image_draw.c
+++ b/cronjob/chart/image_file/image_draw.c
@@ -12,13 +12,14 @@ static gdImagePtr create_image();
 static gdImagePtr draw_image(gdImagePtr);
 static void write_image_png(gdImagePtr, FILE *);
 
-
+/* Baut ein Bild und schreibt es in die Datei */
 int draw_to_file(FILE *fd){
   gdImagePtr img = create_image();
   draw_image(img);
   write_image_png(img, fd);
 }
 
+/* Erstellt ein Bild mit Hintergrundfarbe */
 static gdImagePtr create_image(){
   gdImagePtr new_img   = NULL;
   color back;
@@ -33,11 +34,42 @@ static gdImagePtr create_image(){
   return new_img;
 }
 
+/* Baut das Bild */
 static gdImagePtr draw_image(gdImagePtr img){
-  pix_list_ptr pix_list = get_pix_list(300);
-  scale_y_coords(pix_list, 100, 40, -10);  
+  pix_list_ptr pix_list = NULL;
+  int max_val 		= 0;
+  int min_val 		= 0;
+  int offset_x_left 	= 0;
+  int offset_y_top 	= 0;
+  int offset_x_right 	= 0;
+  int offset_y_bottom 	= 0;
+  int dia_width		= img_cfg.width - offset_x_left - offset_x_right;
+  int dia_height 	= img_cfg.height - offset_y_top - offset_y_bottom;
+  int zero_line 	= 0;
+
+  color val_line_c 	= gdImageColorAllocateAlpha(img, 0,0,0,0);
+  color zero_line_c	= gdImageColorAllocateAlpha(img, 0,0,0,0);
+
+  pix_list = get_pix_list(dia_width);
+
+  /* y-Werte skalieren */
+  zero_line = scale_y_coords(pix_list, dia_height, 40, -10);  
+
+  /* Nullinie */
+  gdImageLine(img, offset_x_left, zero_line + offset_y_top, img_cfg.width - offset_x_right, zero_line + offset_y_top, zero_line_c); 
+  
+  /* Werte Zeichnen */
+  for (; pix_list->next; pix_list = pix_list->next){
+    gdImageLine(img, (offset_x_left + pix_list->x_pix_coord), (zero_line + offset_y_top + pix_list->y_pix_coord), (offset_x_left + pix_list->next->x_pix_coord), (zero_line + offset_y_top + pix_list->next->y_pix_coord), val_line_c);
+  }
+
+
 }
 
+
+
+
+/* Schreibt das Bild in eine Datei */
 static void write_image_png(gdImagePtr img, FILE *fd){
   gdImageAlphaBlending(img, 0);
   gdImageSaveAlpha(img, 1);
diff --git a/cronjob/chart/image_file/testimage.conf b/cronjob/chart/image_file/testimage.conf
index e1eb0d9..4e8761f 100644
--- a/cronjob/chart/image_file/testimage.conf
+++ b/cronjob/chart/image_file/testimage.conf
@@ -4,7 +4,7 @@ manual_table		no
 manual_table_name	auss2_data
 table_field		temp
 gen_interval		15
-show_interval		1h	
+show_interval		30d	
 label_interval		10m
 label_sum   		no
 width			400