diff --git a/extmod/modTrezorUi/modTrezorUi-unix.h b/extmod/modTrezorUi/modTrezorUi-unix.h
index 918d20c2..eb11f5bf 100644
--- a/extmod/modTrezorUi/modTrezorUi-unix.h
+++ b/extmod/modTrezorUi/modTrezorUi-unix.h
@@ -7,7 +7,6 @@
 
 #include <SDL2/SDL.h>
 
-static int SDL_inited = 0;
 static SDL_Renderer *RENDERER = 0;
 static SDL_Surface  *SCREEN   = 0;
 static SDL_Texture  *TEXTURE  = 0;
@@ -21,7 +20,6 @@ static int ROTATION = 0;
 #define DISPLAY_BORDER 8
 
 static void DATAfunc(uint8_t x) {
-    if (!SDL_inited) return;
     if (POSX <= EX && POSY <= EY) {
         ((uint8_t *)SCREEN->pixels)[POSX * 2 + POSY * SCREEN->pitch + (DATAODD ^ 1)] = x;
     }
@@ -57,7 +55,6 @@ static int HandleEvents(void *ptr)
 
 static void display_init(void)
 {
-    if (SDL_inited) return;
     if (SDL_Init(SDL_INIT_VIDEO) != 0) {
         printf("SDL_Init Error: %s\n", SDL_GetError());
     }
@@ -76,11 +73,9 @@ static void display_init(void)
     SCREEN = SDL_CreateRGBSurface(0, RESX, RESY, 16, 0xF800, 0x07E0, 0x001F, 0x0000);
     TEXTURE = SDL_CreateTexture(RENDERER, SDL_PIXELFORMAT_RGB565, SDL_TEXTUREACCESS_STREAMING, RESX, RESY);
     THREAD = SDL_CreateThread(HandleEvents, "EventThread", NULL);
-    SDL_inited = 1;
 }
 
 static void display_set_window(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
-    if (!SDL_inited) return;
     SX = x; SY = y;
     EX = x + w - 1; EY = y + h - 1;
     POSX = SX; POSY = SY;
@@ -89,7 +84,6 @@ static void display_set_window(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
 
 static void display_update(void)
 {
-    if (!SDL_inited) return;
     SDL_RenderClear(RENDERER);
     SDL_UpdateTexture(TEXTURE, NULL, SCREEN->pixels, SCREEN->pitch);
     const SDL_Rect r = {DISPLAY_BORDER, DISPLAY_BORDER, RESX, RESY};
diff --git a/extmod/modTrezorUi/modTrezorUi.c b/extmod/modTrezorUi/modTrezorUi.c
index 11ad8ba0..794c976d 100644
--- a/extmod/modTrezorUi/modTrezorUi.c
+++ b/extmod/modTrezorUi/modTrezorUi.c
@@ -155,8 +155,11 @@ typedef struct _mp_obj_Display_t {
 
 // def Display.__init__(self):
 STATIC mp_obj_t mod_TrezorUi_Display_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
-    display_init();
-    mp_obj_Display_t *o = m_new_obj(mp_obj_Display_t);
+    static mp_obj_Display_t *o = 0; // singleton
+    if (!o) {
+        display_init();
+        o = m_new_obj(mp_obj_Display_t);
+    }
     o->base.type = type;
     return MP_OBJ_FROM_PTR(o);
 }
diff --git a/src/layout.py b/src/layout.py
new file mode 100644
index 00000000..0d268333
--- /dev/null
+++ b/src/layout.py
@@ -0,0 +1,44 @@
+from TrezorUi import Display
+
+def rgb2color(r, g, b):
+    return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3)
+
+RED         = rgb2color(0xF4, 0x43, 0x36)
+PINK        = rgb2color(0xE9, 0x1E, 0x63)
+PURPLE      = rgb2color(0x9C, 0x27, 0xB0)
+DEEP_PURPLE = rgb2color(0x67, 0x3A, 0xB7)
+INDIGO      = rgb2color(0x3F, 0x51, 0xB5)
+BLUE        = rgb2color(0x21, 0x96, 0xF3)
+LIGHT_BLUE  = rgb2color(0x03, 0xA9, 0xF4)
+CYAN        = rgb2color(0x00, 0xBC, 0xD4)
+TEAL        = rgb2color(0x00, 0x96, 0x88)
+GREEN       = rgb2color(0x4C, 0xAF, 0x50)
+LIGHT_GREEN = rgb2color(0x8B, 0xC3, 0x4A)
+LIME        = rgb2color(0xCD, 0xDC, 0x39)
+YELLOW      = rgb2color(0xFF, 0xEB, 0x3B)
+AMBER       = rgb2color(0xFF, 0xC1, 0x07)
+ORANGE      = rgb2color(0xFF, 0x98, 0x00)
+DEEP_ORANGE = rgb2color(0xFF, 0x57, 0x22)
+BROWN       = rgb2color(0x79, 0x55, 0x48)
+GREY        = rgb2color(0x9E, 0x9E, 0x9E)
+BLUE_GRAY   = rgb2color(0x60, 0x7D, 0x8B)
+BLACK       = rgb2color(0x00, 0x00, 0x00)
+WHITE       = rgb2color(0xFF, 0xFF, 0xFF)
+
+MONO   = 0
+NORMAL = 1
+BOLD   = 2
+
+d = Display()
+
+class Layout(object):
+
+    @staticmethod
+    def show_send(address, amount, currency='BTC'):
+        d.bar(0, 0, 240, 40, GREEN)
+        d.bar(0, 40, 240, 200, WHITE)
+        d.text(10, 28, 'Sending', BOLD, WHITE, GREEN)
+        d.text(10, 80, '%f %s' % (amount, currency), BOLD, BLACK, WHITE)
+        d.text(10, 110, 'to this address:', NORMAL, BLACK, WHITE)
+        d.text(10, 140, address[:18], MONO, BLACK, WHITE)
+        d.text(10, 160, address[18:], MONO, BLACK, WHITE)
diff --git a/src/main.py b/src/main.py
index 86a4efff..c00add41 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1,29 +1,6 @@
-from TrezorUi import Display
-
-def rgb2color(r, g, b):
-    return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3)
-
-BLACK = 0x0000
-WHITE = 0xFFFF
-BLUEGRAY = rgb2color(0x80, 0x80, 0x80)
-
-MONO   = 0
-NORMAL = 1
-BOLD   = 2
-
-d = Display()
-
-d.bar(0, 0, 240, 40, BLUEGRAY)
-d.bar(0, 40, 240, 200, WHITE)
-
-d.text(10, 28, 'Sending', BOLD, WHITE, BLUEGRAY)
-
-d.text(10, 80, '110.126967 BTC', BOLD, BLACK, WHITE)
-d.text(10, 110, 'to this address:', NORMAL, BLACK, WHITE)
-
-d.text(10, 140, '1BitkeyP2nDd5oa64x', MONO, BLACK, WHITE)
-d.text(10, 160, '7AjvBbbwST54W5Zmx2', MONO, BLACK, WHITE)
+from layout import Layout
 
+Layout.show_send('1BitkeyP2nDd5oa64x7AjvBbbwST54W5Zmx2', 110.126967)
 
 while True:
     pass