diff --git a/redony.h b/shutter.h
similarity index 62%
rename from redony.h
rename to shutter.h
index 0427cef..3517608 100644
--- a/redony.h
+++ b/shutter.h
@@ -7,16 +7,20 @@
 
 #include <time.h>
 
+typedef char byte;
 
 typedef struct ido {
-  int tm_hour;
-  int tm_min;
+  byte tm_hour;
+  byte tm_min;
 } ido;
 
 typedef struct redony {
-  int ch;
+  byte ch;
   ido up;
   ido down;
+  byte rolltime_up;     //measured in seconds
+  byte rolltime_down;   //measured in seconds
+  byte percentage;
 } redony;
 
 typedef enum buttons {
diff --git a/idozites.c b/timing.c
similarity index 96%
rename from idozites.c
rename to timing.c
index 7981971..12b83e3 100644
--- a/idozites.c
+++ b/timing.c
@@ -60,7 +60,7 @@ int find_next_day (FILE *f)
   return 0;
 }
 
-void get_timing (redony *r, FILE *schedule)
+void get_timing (shutter *r, FILE *schedule)
 {
   int channel = 0;
   while (channel != r->ch)
@@ -81,7 +81,7 @@ void get_timing (redony *r, FILE *schedule)
 
 }
 
-buttons check_timing (redony *r)
+buttons check_timing (shutter *r)
 {
   if ((r->up.tm_hour == r->down.tm_hour) && (r->up.tm_min == r->down.tm_min))
     return stop;
diff --git a/idozites.h b/timing.h
similarity index 60%
rename from idozites.h
rename to timing.h
index 222ded5..af5de06 100644
--- a/idozites.h
+++ b/timing.h
@@ -4,13 +4,13 @@
 #ifndef _IDOZITES_H_
 #define _IDOZITES_H_
 
-#include "redony.h"
+#include "shutter.h"
 #include <time.h>
 #include <stdio.h>
 
-void get_timing (redony *r, FILE *schedule);
+void get_timing (shutter *r, FILE *schedule);
 
-buttons check_timing (redony *r);
+buttons check_timing (shutter *r);
 
 int find_today (FILE *schedule);