diff --git a/nob.c b/nob.c
index c8b6a6f..b31975b 100644
--- a/nob.c
+++ b/nob.c
@@ -11,7 +11,7 @@
 
 const char *cflags[] = {"-g",          "-rdynamic", "-lm",   "-lwayland-client",
                         "-lxkbcommon", "-lvulkan",  "-lglfw"};
-const char *blacklist[] = {"parser.c"};
+const char *blacklist[] = {"parser.c", "paw_shh_gen.c"};
 const char *comp = "cc";
 const char *scomp = "glslc";
 
@@ -169,7 +169,17 @@ int main(int argc, char **argv) {
   for (int j = 0; j < len(cflags); j++) {
     cmd_append(&cmd, cflags[j]);
   }
-  cmd_append(&cmd, "-o", "main_layer", "main_layer.c");
+  cmd_append(&cmd, "-o", "main", "main.c");
+  for (int i = 0; i < src_cpaths.count; i++) {
+    cmd_append(&cmd, src_cpaths.items[i]);
+  }
+  cmd_run_sync_and_reset(&cmd);
+
+  cmd_append(&cmd, comp);
+  for (int j = 0; j < len(cflags); j++) {
+    cmd_append(&cmd, cflags[j]);
+  }
+  cmd_append(&cmd, "-o", "test", "./src/test/paw_shh_gen.c");
   for (int i = 0; i < src_cpaths.count; i++) {
     cmd_append(&cmd, src_cpaths.items[i]);
   }
diff --git a/shader.glsl b/shader.glsl
new file mode 100644
index 0000000..4b64da3
--- /dev/null
+++ b/shader.glsl
@@ -0,0 +1,23 @@
+#version 450
+
+layout(location = 0) in vec2 inPosition;
+layout(location = 1) in vec3 inColor;
+layout(location = 2) in uint index;
+
+layout(set = 0, binding = 0) uniform UBO {
+    mat3 view;
+    mat3 proj;
+} ubo;
+
+layout(set = 0, binding = 1) uniform UBO_INST {
+    mat3 model[1000];
+} ubo_inst;
+
+layout(location = 0) out vec3 fragColor;
+layout(location = 1) out vec2 fragUV;
+
+void main() {
+    gl_Position = vec4(ubo.proj * ubo.view * ubo_inst.model[index] * vec3(inPosition, 1.0), 1.0);
+    fragColor = inColor;
+    fragUV = inPosition + vec2(0.5, 0.5);
+}
diff --git a/shader.glslinfo b/shader.glslinfo
new file mode 100644
index 0000000..1b5c162
Binary files /dev/null and b/shader.glslinfo differ
diff --git a/src/paw_log.h b/src/paw_log.h
index b0c8bac..892e204 100644
--- a/src/paw_log.h
+++ b/src/paw_log.h
@@ -9,7 +9,7 @@
   fprintf(stderr, "[%s:%d] " fmt "\n", __FILE__, __LINE__, ##__VA_ARGS__)
 #define crash(fmt, ...)                                                        \
   fprintf(stderr, "[%s:%d] " fmt "\n", __FILE__, __LINE__, ##__VA_ARGS__);     \
-  *(int *)0 = 0;
+  abort();
 
 void paw_print_backtrace();
 const char *paw_b_to_s(bool b);
diff --git a/src/string.c b/src/string.c
index b7135d5..741474d 100644
--- a/src/string.c
+++ b/src/string.c
@@ -7,6 +7,18 @@
 #include <stdio.h>
 #include <string.h>
 
+struct PawSB paw_sb_make() {
+  char *string = malloc(1);
+  *string = 0x0;
+  return (struct PawSB){string};
+}
+void paw_sb_append(struct PawSB *sb, char *string) {
+  char *new = realloc(sb->string, strlen(sb->string) + strlen(string) + 1);
+  memmove(new, sb->string, strlen(sb->string) + 1);
+  memcpy(new + strlen(new), string, strlen(string) + 1);
+}
+char *paw_sb_get(struct PawSB *sb) { return sb->string; }
+
 struct da_string split(struct PawMem *mem, char *string, char needle) {
   struct da_string items;
   paw_da_make_inplace_mem(&items, mem);
@@ -54,7 +66,7 @@ char *extract_brackets(struct PawMem *mem, char *start, char open, char close) {
   return res;
 }
 
-// before: asddasasd(aslfaddf)
+// before: asdasasd(aslfaddf)
 //           ^
 // after:  asddasasd(aslfaddf)
 //                            ^
@@ -198,3 +210,10 @@ char *skip_after_char(char *string, char n) {
   }
   return string + 1;
 }
+
+char *skip_after_string(char *string, char *n) {
+  while (!start_matches(string, n)) {
+    string++;
+  }
+  return string + strlen(n);
+}
diff --git a/src/string.h b/src/string.h
index 74046ad..46bc61f 100644
--- a/src/string.h
+++ b/src/string.h
@@ -6,6 +6,13 @@
 
 #include <stdbool.h>
 
+struct PawSB {
+  char *string;
+};
+struct PawSB paw_sb_make();
+void paw_sb_append(struct PawSB *sb, char *string);
+char *paw_sb_get(struct PawSB *sb);
+
 struct da_string split(struct PawMem *mem, char *string, char needle);
 bool start_matches(char *string, char *match);
 char *extract_brackets(struct PawMem *mem, char *start, char open, char close);
@@ -25,5 +32,6 @@ char *mem_strdup_reg(char *start, char *end, struct PawMem *mem);
 char *strdup_reg(char *start, char *end);
 char *skip_to_char(char *string, char n);
 char *skip_after_char(char *string, char n);
+char *skip_after_string(char *string, char *n);
 
 #endif // INCLUDE_SRC_STRING_H_
diff --git a/src/test/paw_shh_gen.c b/src/test/paw_shh_gen.c
new file mode 100644
index 0000000..88d5d34
--- /dev/null
+++ b/src/test/paw_shh_gen.c
@@ -0,0 +1,64 @@
+#include "../io.h"
+#include "../paw_da.h"
+#include "../paw_log.h"
+#include "../string.h"
+
+struct Prop {
+  char *name;
+  char *type;
+};
+paw_da_define(da_Prop, struct Prop);
+
+int main(int argc, char *argv[]) {
+  char *path;
+  char *output;
+  if (argc < 2) {
+    path = "shader.glsl";
+  } else {
+    path = argv[1];
+  }
+
+  if (argc < 3) {
+    output = "shader.glslinfo";
+  } else {
+    output = argv[2];
+  }
+  char *file = read_text_file(path);
+  meow("%s", file);
+
+  struct da_Prop props;
+  paw_da_make_inplace(&props);
+
+  char *mark =
+      skip_after_string(file, "layout(set = 0, binding = 0) uniform UBO {\n");
+  *skip_to_char(mark, '}') = 0;
+
+  while (*mark != 0x0) {
+    mark = trim_start(mark);
+    char *middle = skip_to_char(mark, ' ');
+    char *end = skip_to_char(middle, ';');
+    *middle = 0x0;
+    *end = 0x0;
+    paw_da_append(&props, ((struct Prop){
+                              .type = mark,
+                              .name = middle + 1,
+                          }));
+    mark = trim_start(end + 1);
+  }
+
+  struct PawSB sb = paw_sb_make();
+  for (int i = 0; i < props.count; i++) {
+    paw_sb_append(&sb, props.items[i].type);
+    paw_sb_append(&sb, " ");
+    paw_sb_append(&sb, props.items[i].name);
+    paw_sb_append(&sb, "\n");
+  }
+  char *res = paw_sb_get(&sb);
+  write_binary_file(output, res, strlen(res) + 1);
+
+  paw_da_free(&props);
+  free(res);
+
+  free(file);
+  return 0;
+}
diff --git a/src/test/shader.glsl b/src/test/shader.glsl
new file mode 100644
index 0000000..e69de29
diff --git a/src/wayland.c b/src/wayland.c
index d7bfdc1..a5aa418 100644
--- a/src/wayland.c
+++ b/src/wayland.c
@@ -335,6 +335,9 @@ struct cat_Wl *cat_init_wl_layer(const char *name, struct Vk **vk) {
 
   state->wl_surface = wl_compositor_create_surface(state->compositor);
 
+  if (state->layer_shell == NULL) {
+    crash("your compositor does not support layer shell :[");
+  }
   state->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
       state->layer_shell, state->wl_surface, NULL,
       ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND, "wlroots");
diff --git a/test b/test
new file mode 100755
index 0000000..f9853aa
Binary files /dev/null and b/test differ