diff --git a/programs/develop/tinypy/tinypy/Makefile b/programs/develop/tinypy/tinypy/Makefile
index 2ff0a5891..2612ee159 100644
--- a/programs/develop/tinypy/tinypy/Makefile
+++ b/programs/develop/tinypy/tinypy/Makefile
@@ -1,6 +1,6 @@
 export MENUETDEV=../../libraries/menuetlibc
 OUTFILE = tpmain
-OBJS = tpmain.o kolibri_init.o kolibri_fs.o
+OBJS = tpmain.o kolibri_init.o kolibri_fs.o kolibri_gui.o
 include $(MENUETDEV)/makefiles/Makefile_for_program
 #testmod.o: fasm_modules/testmod.s
 #	fasm fasm_modules/testmod.s
diff --git a/programs/develop/tinypy/tinypy/kolibri_gui.c b/programs/develop/tinypy/tinypy/kolibri_gui.c
new file mode 100644
index 000000000..497dfb638
--- /dev/null
+++ b/programs/develop/tinypy/tinypy/kolibri_gui.c
@@ -0,0 +1,160 @@
+#include "tp.h"
+#include <menuet/thread.h>
+
+typedef unsigned short int uint16_t;
+typedef unsigned int uint32_t;
+
+extern void _tp_raise(TP,tp_obj);
+extern tp_obj tp_dict(TP);
+extern tp_obj tp_method(TP,tp_obj self,tp_obj v(TP));
+extern tp_obj tp_number(tp_num v);
+extern tp_obj tp_list(TP);
+extern void _tp_list_append(TP,_tp_list *self, tp_obj v);
+extern tp_obj tp_call(TP, const char *mod, const char *fnc, tp_obj params);
+extern void _tp_call(TP,tp_obj *dest, tp_obj fnc, tp_obj params);
+extern int tp_bool(TP,tp_obj v);
+extern tp_obj tp_has(TP,tp_obj self, tp_obj k);
+#define _cdecl __attribute__((cdecl))
+extern int (* _cdecl con_printf)(const char* format,...);
+static tp_obj kolibri_show(TP)
+{
+    tp_obj self = TP_TYPE(TP_DICT);
+    uint16_t xpos = (uint16_t)(tp_get(tp, self, tp_string("x")).number.val);
+    uint16_t ypos = (uint16_t)tp_get(tp, self, tp_string("y")).number.val;
+    uint16_t height = (uint16_t)tp_get(tp, self, tp_string("height")).number.val;
+    uint16_t width = (uint16_t)tp_get(tp, self, tp_string("width")).number.val;
+    uint16_t fixedsize = (uint16_t)tp_get(tp, self, tp_string("fixedsize")).number.val;
+    uint32_t bgcolor = (uint32_t)tp_get(tp, self, tp_string("bgcolor")).number.val;
+    uint32_t status;
+    uint32_t style;
+    uint32_t x = xpos * 0x10000 + width;
+    uint32_t y = ypos * 0x10000 + height;
+    if (fixedsize)
+        style = 0;
+    else
+        style = 0x33000000 + (bgcolor & 0xFFFFFF);
+    asm volatile ("int $0x40"::"a"(12), "b"(1));
+    asm volatile ("int $0x40"::
+                  "a"(0), "b"(x), "c"(y), "d"(style),
+                  "S"(0), "D"(0));
+    asm volatile ("int $0x40"::"a"(12), "b"(2));
+    /* If window has additional handler, run it. */
+    if (tp_bool(tp, tp_has(tp, self, tp_string("on_show"))))
+    {
+        tp_obj result;
+        tp_obj fnc = tp_get(tp, self, tp_string("on_show"));
+        tp_obj param_list = tp_list(tp); /* Prepare parameters. */
+        _tp_list_append(tp, param_list.list.val, self);
+        _tp_call(tp, &result, fnc, param_list);
+    }
+    return tp_None;
+}
+
+static void window_function(void)
+{
+    uint32_t ev;
+    /* Wait for event. */
+    do {
+        asm volatile("int $0x40":"=a"(ev):"a"(10));
+    } while(ev != 3);
+    asm volatile("int $040"::"a"(-1));
+}
+
+static tp_obj kolibri_default_handler(TP)
+{
+    return tp_None;
+}
+
+/* Run window_function() in separated thread. */
+static tp_obj kolibri_run(TP)
+{
+    tp_obj self = TP_TYPE(TP_DICT);
+    tp_obj redraw = tp_get(tp, self, tp_string("show"));
+    tp_obj result;
+    tp_obj key_handler = tp_None;
+    tp_obj button_handler = tp_None;
+    int    button_id;
+    uint32_t ev;
+    int    leave=0;
+    tp_obj param_list;
+    /* Obtain handlers. */
+    if (tp_bool(tp, tp_has(tp, self, tp_string("on_key"))))
+        key_handler = tp_get(tp, self, tp_string("on_key"));
+    if (tp_bool(tp, tp_has(tp, self, tp_string("on_button"))))
+        button_handler = tp_get(tp, self, tp_string("on_button"));
+
+    while(!leave){
+        asm volatile("int $0x40":"=a"(ev):"a"(10));
+        switch (ev)
+        {
+            case 1:
+                _tp_call(tp, &result, redraw, tp_None);
+                break;
+            case 2:
+                if (key_handler.type == TP_FNC)
+                {
+                    param_list = tp_list(tp); /* Prepare parameters. */
+                    _tp_list_append(tp, param_list.list.val, self);
+                    _tp_list_append(tp, param_list.list.val, tp_number(__menuet__getkey()));
+                    _tp_call(tp, &result, key_handler, param_list);
+                }
+                break;
+            case 3:
+                button_id = __menuet__get_button_id();
+                if (button_id == 1)
+                    leave = 1;
+                else if (button_handler.type == TP_FNC)
+                {
+                    param_list = tp_list(tp); /* Prepare parameters. */
+                    _tp_list_append(tp, param_list.list.val, self);
+                    _tp_list_append(tp, param_list.list.val, tp_number(button_id));
+                    _tp_call(tp, &result, button_handler, param_list);
+                }
+                break;
+            default:
+                con_printf("Got unknown event %d\n", ev);
+                break;
+        }
+    };
+    return tp_None;
+}
+
+static tp_obj kolibri_print_text(TP)
+{
+    tp_obj self = TP_TYPE(TP_DICT);
+    uint32_t textcolor = (uint32_t)tp_get(tp, self, tp_string("textcolor")).number.val;
+    uint16_t x = (uint16_t)tp_get(tp, self, tp_string("curx")).number.val;
+    uint16_t y = (uint16_t)tp_get(tp, self, tp_string("cury")).number.val;
+    uint32_t ofs;
+    uint32_t width = (uint32_t)tp_get(tp, self, tp_string("width")).number.val;
+    tp_obj text = TP_TYPE(TP_STRING);
+
+    __menuet__write_text(x, y, textcolor, (char *)text.string.val, text.string.len);
+    /* Update cursor position. */
+    ofs = 6 * text.string.len;
+    tp_set(tp, self, tp_string("cury"), tp_number(y + 9 * ((x + ofs) / width)));
+    tp_set(tp, self, tp_string("curx"), tp_number((x + ofs)%width));
+
+    return tp_None;
+}
+
+tp_obj kolibri_mainwindow(TP)
+{
+    tp_obj obj = tp_dict(tp);
+    obj = tp_dict(tp);
+    tp_set(tp, obj, tp_string("x"), TP_TYPE(TP_NUMBER));
+    tp_set(tp, obj, tp_string("y"), TP_TYPE(TP_NUMBER));
+    tp_set(tp, obj, tp_string("height"), TP_TYPE(TP_NUMBER));
+    tp_set(tp, obj, tp_string("width"), TP_TYPE(TP_NUMBER));
+    tp_set(tp, obj, tp_string("curx"), tp_number(0));
+    tp_set(tp, obj, tp_string("cury"), tp_number(0));
+    tp_set(tp, obj, tp_string("fixedsize"), TP_TYPE(TP_NUMBER));
+    tp_set(tp, obj, tp_string("textcolor"), tp_number(0x202020));
+    tp_set(tp, obj, tp_string("bgcolor"), tp_number(0xFFFFFF));
+    tp_set(tp, obj, tp_string("show"), tp_method(tp, obj, kolibri_show));
+    tp_set(tp, obj, tp_string("run"), tp_method(tp, obj, kolibri_run));
+    /*tp_set(tp, obj, tp_string("keyhandler"), tp_method(tp, obj, kolibri_default_handler));
+    tp_set(tp, obj, tp_string("buttonhandler"), tp_method(tp, obj, kolibri_default_handler));*/
+    tp_set(tp, obj, tp_string("print_text"), tp_method(tp, obj, kolibri_print_text));
+    return obj;
+}
diff --git a/programs/develop/tinypy/tinypy/test.py b/programs/develop/tinypy/tinypy/test.py
index e48a99869..76e2e29d6 100644
--- a/programs/develop/tinypy/tinypy/test.py
+++ b/programs/develop/tinypy/tinypy/test.py
@@ -1,12 +1,20 @@
 import kolibri
+
+def onshow():
+    print("Show window")
+
+def onkey():
+    print("Key pressed")
+
+def onbtn():
+    print("Button pressed")
+
 if __name__=="__main__":
-  print("ok!")
-  f = kolibri.open("/hd0/1/tinypy/test.txt", "a")
-  l=[]
-  s=""
-  for i in range(10):
-      s = s + 'A'
-      l.append(s+'\n')
-  print(l)
-  f.writelines(l)
-  f.close()
+  w = kolibri.window(10,10,400, 400, False)
+  w.on_show = onshow
+  w.on_key = onkey
+  w.on_button = onbtn
+  w.show()
+  print("running")
+  w.run()
+  print("Exit")
diff --git a/programs/develop/tinypy/tinypy/tpmain.c b/programs/develop/tinypy/tinypy/tpmain.c
index f35015f39..ae1058b95 100644
--- a/programs/develop/tinypy/tinypy/tpmain.c
+++ b/programs/develop/tinypy/tinypy/tpmain.c
@@ -19,6 +19,7 @@ void main(void) {
     /* INIT */
     tp_call(tp,"py2bc","tinypy",tp_None);
     tp_deinit(tp);
+    kol_exit();
     return;
 }