diff --git a/src/graphic_loading.c b/src/graphic_loading.c
index 430755e..0a65aaa 100644
--- a/src/graphic_loading.c
+++ b/src/graphic_loading.c
@@ -110,7 +110,7 @@ void fb_rect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color) {
 
     if (rowrem + h < 8) {
         // all within one cell
-        uint8_t mask = (0xFF << rowrem) & (0xFF >> (h-rowrem));
+        uint8_t mask = (0xFF << rowrem) & (0xFF >> (8 - (h - rowrem)));
 
         for(uint8_t i = 0; i < w; i++) {
             if (color) {
@@ -130,7 +130,7 @@ void fb_rect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color) {
                 fb[cell + i] &= ~mask;
             }
         }
-        h -= rowrem;
+        h -= 8 - rowrem;
 
         uint8_t whole_cells = h / 8;
         h -= whole_cells * 8;
@@ -145,6 +145,8 @@ void fb_rect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color) {
             }
         }
 
+        cell += FBW;
+
         // last
         mask = (0xFF >> (8-h));
         for(uint8_t i = 0; i < w; i++) {
@@ -157,40 +159,68 @@ void fb_rect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color) {
     }
 }
 
+void fb_bitmap(uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *map, uint8_t color) {
+    // TODO
+}
+
+
 void fb_blit() {
     ssd1306_drawBuffer(0, 0, FBW, FBH, fb);
 }
 
-
 void show_loading_screen(uint8_t progress_percent, bool clear)
 {
     // HACKS - GUI dev here
 
     fb_clear();
     fb_blit();
-//
-//    fb_hline(3, 3, 30, 1);
-//    fb_hline(3, 15, 35, 1);
-//    fb_hline(3, 30, 40, 1);
-//
-//    fb_vline(5, 0, 15, 1);
-//    fb_vline(6, 0, 32, 0);
-
-    fb_rect(10, 10, 30, 3, 1);
-    fb_rect(40, 13, 3, 10, 1);
-//
-//    fb_rect(0, 0, 10, 10, 1);
-//
-//    fb_rect(7, 20, 20, 1, 1);
-//    fb_rect(7, 23, 20, 3, 1);
-
-    //fb_rect(15, 0, 5, 20, 0);
-
-    fb_blit();
-
 
+#if 0
+    int a = 0, b = 0, ai = 1, bi = 1;
+    int c = 50, d = 5, ci = -1, di = 1;
+    int e = 70, f = 10, ei = 1, fi = -1;
+
+    int w=15;
+    int W=20;
+
+    for(;;){
+        fb_clear();
+
+        fb_rect(a, b, w, w, 1);
+        fb_rect(c, d, w, w, 1);
+        fb_rect(e, f, W, W, 1);
+
+        fb_rect(a+1, b+1, w-2, w-2, 0);
+        fb_rect(c+1, d+1, w-2, w-2, 0);
+        fb_rect(e+1, f+1, W-2, W-2, 0);
+
+        a += ai;
+        if (a == FBW-1-w) ai = -1;
+        if (a == 0) ai = 1;
+        b += bi;
+        if (b == FBH-1-w) bi = -1;
+        if (b == 0) bi = 1;
+
+        c += ci;
+        if (c == FBW-1-w) ci = -1;
+        if (c == 0) ci = 1;
+        d += di;
+        if (d == FBH-1-w) di = -1;
+        if (d == 0) di = 1;
+
+        e += ei;
+        if (e == FBW-1-W) ei = -1;
+        if (e == 0) ei = 1;
+        f += fi;
+        if (f == FBH-1-W) fi = -1;
+        if (f == 0) fi = 1;
+
+        fb_blit();
+        _delay_ms(5);
+    }
+#endif
 
-    for(;;){}
+    for(;;) {}
 
 
     if (clear) {