diff --git a/; b/;
new file mode 100644
index 0000000..d3bd993
--- /dev/null
+++ b/;
@@ -0,0 +1,31 @@
+#include <tart.h>
+#include <memory.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main (int argc, char *argv[]) {
+    struct tart_window window = tart_create_window();
+    struct tart_buffer mainbuff = tart_create_buffer(109, {20,20},{20,20});
+    struct tart_cell* cells = (struct tart_cell*)malloc(mainbuff.cell_count * sizeof(struct tart_cell));
+    //for(int i = 1; i < mainbuff.cell_count; i += 2) {
+    //    cells[i] = tart_create_cell('^', TART_STYLE_BLINKING, TART_COLOR_BLACK_FOREGROUND, TART_COLOR_WHITE_BACKGROUND);
+    //}
+    //for(int i = 0; i <  + mainbuff.cell_count; i += 2) {
+    //    cells[i] = tart_create_cell('^', TART_STYLE_BLINKING, TART_COLOR_RED_FOREGROUND, TART_COLOR_BLACK_BACKGROUND);
+    //}
+    tart_add_cells_to_buffer(&mainbuff, cells);
+
+    struct tart_vec2 positions[4] = {{0,0},{0,1},{1,0},{1,1}};
+    struct tart_cell cell = tart_create_cell('0', TART_STYLE_BLINKING, TART_COLOR_RED_FOREGROUND, TART_COLOR_GREEN_BACKGROUND);
+    struct tart_cell cellss[4] = {cell,cell,cell,cell};
+
+    struct tart_csprite sprite = tart_csprite(cellss,positions,4);
+    tart_draw_cell_position(&mainbuff, cell, {3,3});
+    //tart_draw_csprite_position(&mainbuff, sprite, {2,2});
+
+    char t[1] = {'0'};
+    tart_add_buffer(&window, mainbuff);
+    tart_draw_window(&window, t);
+    
+    return 0;
+}
diff --git a/includes/tart.h b/includes/tart.h
index 65c8577..082d9c0 100644
--- a/includes/tart.h
+++ b/includes/tart.h
@@ -24,7 +24,7 @@ extern "C" {
 #define NULL_CELL (struct tart_cell){{0,0,0},{0,0,0},0,0,0}
 #define TART_CELL_DATA_SIZE 16 // todo add number
 #else
-#define NULL_CELL (struct tart_cell){0,0,0,0}
+#define NULL_CELL (struct tart_cell){0,0,0,' '}
 #define TART_CELL_DATA_SIZE 20
 #endif
 #define TART_OK 0
diff --git a/source/tart.c b/source/tart.c
index e54c4a7..aa06977 100644
--- a/source/tart.c
+++ b/source/tart.c
@@ -160,6 +160,7 @@ struct tart_csprite tart_csprite(struct tart_cell* cells, struct tart_vec2* posi
             sprite.bounds.y = positions[i].y;
         }
     }
+    sprite.size = size;
     return sprite;
 };
 
@@ -173,7 +174,7 @@ tart_byte tart_csprite_free(struct tart_csprite* sprite) {
 }
 
 tart_byte tart_draw_cell_position(struct tart_buffer * buffer, struct tart_cell cell, struct tart_vec2 position) {
-    if(buffer->size.y >= position.y && buffer->size.x >= position.x) {
+    if(buffer->size.x >= position.x && buffer->size.y >= position.y) {
         buffer->cells[(buffer->size.x * position.y) + position.x] = cell;
     }
     return TART_OK;
@@ -190,7 +191,7 @@ tart_byte tart_draw_cstring_position(struct tart_buffer *buffer, struct tart_cst
 
 tart_byte tart_draw_csprite_position(struct tart_buffer * buffer, struct tart_csprite sprite, struct tart_vec2 basePosition) {
     for(int i = 0; i < sprite.size; i++) {
-    struct tart_vec2 position = {sprite.position[i].x + basePosition.x, sprite.position[i].y + basePosition.y};
+        struct tart_vec2 position = {sprite.position[i].x + basePosition.x, sprite.position[i].y + basePosition.y};
         tart_draw_cell_position(buffer, sprite.data[i], position);
     }
     return TART_OK;
diff --git a/testing/render_test/main.cpp b/testing/render_test/main.cpp
index 420e6dc..241d132 100644
--- a/testing/render_test/main.cpp
+++ b/testing/render_test/main.cpp
@@ -5,7 +5,7 @@
 
 int main (int argc, char *argv[]) {
     struct tart_window window = tart_create_window();
-    struct tart_buffer mainbuff = tart_create_buffer(109, {100,50},{20,20});
+    struct tart_buffer mainbuff = tart_create_buffer(109, {20,20},{20,20});
     struct tart_cell* cells = (struct tart_cell*)malloc(mainbuff.cell_count * sizeof(struct tart_cell));
     for(int i = 1; i < mainbuff.cell_count; i += 2) {
         cells[i] = tart_create_cell('^', TART_STYLE_BLINKING, TART_COLOR_BLACK_FOREGROUND, TART_COLOR_WHITE_BACKGROUND);
@@ -15,6 +15,16 @@ int main (int argc, char *argv[]) {
     }
     tart_add_cells_to_buffer(&mainbuff, cells);
 
+    struct tart_vec2 positions[4] = {{0,0},{0,1},{1,0},{3,2}};
+    struct tart_cell cell = tart_create_cell('0', TART_STYLE_BLINKING, TART_COLOR_RED_FOREGROUND, TART_COLOR_GREEN_BACKGROUND);
+    struct tart_cell cellss[4] = {cell,cell,cell,cell};
+
+    struct tart_csprite sprite = tart_csprite(cellss,positions,4);
+    tart_draw_csprite_position(&mainbuff, sprite, {2,2});
+    tart_draw_csprite_position(&mainbuff, sprite, {5,2});
+    tart_draw_csprite_position(&mainbuff, sprite, {5,5});
+    tart_draw_csprite_position(&mainbuff, sprite, {21,18});
+
     char t[1] = {'0'};
     tart_add_buffer(&window, mainbuff);
     tart_draw_window(&window, t);