diff --git a/source/tart.c b/source/tart.c
index eaa7c0b..4096580 100644
--- a/source/tart.c
+++ b/source/tart.c
@@ -77,26 +77,41 @@ struct tart_cell tart_set_cell(struct tart_buffer* buffer, struct tart_cell cell
 }
 
 tart_byte tart_draw_window(struct tart_window * window, char* rend_buffer) {
-    int p = 0;
+    int offset = 0;
     int i = 0;
+    window->data = malloc((window->size.x * window->size.y * sizeof(char) * TART_CELL_DATA_SIZE)+ 100 );
     for (int b = 0;b < 0xFF; b++) {
-        for (int y = 0; y < window->size.y; y++) {
-            for (int x = 0; x < window->size.x; x++) {
-                for (int p = 0; p < TART_CELL_DATA_SIZE;p++) {
+        if(window->buffers[b].cell_count == 0) 
+            continue;
+        for (int y = 0; y < window->buffers[b].size.y; y++) {
+            for (int x = 0; x < window->buffers[b].size.x; x++) {
                     // add data to window c buffer.
+                    struct tart_cell cell = window->buffers[b].cells[(y*window->buffers[b].size.x) + x];
+                    char pre[16];
+                    int size = sprintf(pre, "\033[%d;%d;%dm%c\033[0;0m", (int)cell.style, cell.foreground, cell.background, cell.display);
+                    for(int preIdx = 0; preIdx < size; preIdx++) {
+                        window->data[(y*window->buffers[b].size.x) + x + offset] = pre[preIdx];
+                        offset++;
                     
-                    i++;
                 }
             }
+            window->data[((y)*window->buffers[b].size.x) + offset + window->buffers[b].size.x] = '\n';
+            offset++;
+
+            
             // add cursor move command.
             i++;
         }
     }
-    printf(window->data);
+    fwrite(window->data, sizeof(char), (window->size.x * window->size.y * sizeof(char))+ 100 , stdout);
+    free(window->data);
     return TART_OK;
 };
 
 tart_byte tart_add_cells_to_buffer(struct tart_buffer* buffer, struct tart_cell* cells) {
+    for(int i = 0; i < buffer->cell_count; i++) {
+        buffer->cells[i] = cells[i];
+    }
 
     return TART_OK;
 }
diff --git a/testing/CMakeLists.txt b/testing/CMakeLists.txt
index a310f3d..d38bd13 100644
--- a/testing/CMakeLists.txt
+++ b/testing/CMakeLists.txt
@@ -25,3 +25,4 @@ set( CMAKE_CXX_STANDARD 11)
 set( CMAKE_CXX_STANDARD_REQUIRED ON)
 add_executable(${PROJECT_NAME} input.cpp )
 target_link_libraries(${PROJECT_NAME} TartLib PickleLib)
+add_subdirectory(render_test)
diff --git a/testing/render_test/CMakeLists.txt b/testing/render_test/CMakeLists.txt
new file mode 100644
index 0000000..284f22d
--- /dev/null
+++ b/testing/render_test/CMakeLists.txt
@@ -0,0 +1,7 @@
+set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin/tests)
+project(render_test)
+
+set( CMAKE_CXX_STANDARD 11)
+set( CMAKE_CXX_STANDARD_REQUIRED ON)
+add_executable(${PROJECT_NAME} main.cpp )
+target_link_libraries(${PROJECT_NAME} TartLib)
diff --git a/testing/render_test/main.cpp b/testing/render_test/main.cpp
new file mode 100644
index 0000000..0875d57
--- /dev/null
+++ b/testing/render_test/main.cpp
@@ -0,0 +1,20 @@
+#include <tart.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[20*20];
+    for(int i = 1; i < 20*20; i += 2) {
+        cells[i] = tart_create_cell('^', TART_STYLE_BOLD, TART_COLOR_BLACK_FOREGROUND, TART_COLOR_WHITE_BACKGROUND);
+    }
+    for(int i = 0; i <  + 20*20; i += 2) {
+        cells[i] = tart_create_cell('^', TART_STYLE_BOLD, TART_COLOR_WHITE_BACKGROUND, TART_COLOR_BLACK_BACKGROUND);
+    }
+    tart_add_cells_to_buffer(&mainbuff, cells);
+
+    char* t;
+    tart_add_buffer(&window, mainbuff);
+    tart_draw_window(&window, t);
+    
+    return 0;
+}