diff --git a/blacklayer.c b/blacklayer.c
new file mode 100644
index 0000000..156ff93
--- /dev/null
+++ b/blacklayer.c
@@ -0,0 +1,121 @@
+#include <gtk/gtk.h>
+#include <gtk-layer-shell.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+/* -------------------------------------------------
+ * Hyprland monitor name -> ID
+ * ------------------------------------------------- */
+static int get_monitor_id(const char *name) {
+    char cmd[512];
+    snprintf(
+        cmd,
+        sizeof(cmd),
+        "hyprctl -j monitors | jq -r '.[] | select(.name==\"%s\") | .id'",
+        name
+    );
+
+    FILE *fp = popen(cmd, "r");
+    if (!fp)
+        return -1;
+
+    int id = -1;
+    fscanf(fp, "%d", &id);
+    pclose(fp);
+
+    return id;
+}
+
+/* -------------------------------------------------
+ * Read resource from blacklayer.conf
+ * ------------------------------------------------- */
+static char *get_resource_path(void) {
+    const char *home = getenv("HOME");
+    if (!home)
+        return NULL;
+
+    char path[512];
+    snprintf(path, sizeof(path),
+             "%s/.config/blacklayer/blacklayer.conf", home);
+
+    FILE *fp = fopen(path, "r");
+    if (!fp)
+        return NULL;
+
+    static char line[1024];
+    while (fgets(line, sizeof(line), fp)) {
+        if (strncmp(line, "resource=", 9) == 0) {
+            char *res = line + 9;
+            res[strcspn(res, "\n")] = 0;
+            fclose(fp);
+            return (*res) ? res : NULL;
+        }
+    }
+
+    fclose(fp);
+    return NULL;
+}
+
+int main(int argc, char **argv) {
+    gtk_init(&argc, &argv);
+
+    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+    gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
+    gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
+
+    gtk_layer_init_for_window(GTK_WINDOW(window));
+    gtk_layer_set_layer(GTK_WINDOW(window),
+                        GTK_LAYER_SHELL_LAYER_OVERLAY);
+
+    gtk_layer_set_anchor(GTK_WINDOW(window),
+                         GTK_LAYER_SHELL_EDGE_TOP, TRUE);
+    gtk_layer_set_anchor(GTK_WINDOW(window),
+                         GTK_LAYER_SHELL_EDGE_BOTTOM, TRUE);
+    gtk_layer_set_anchor(GTK_WINDOW(window),
+                         GTK_LAYER_SHELL_EDGE_LEFT, TRUE);
+    gtk_layer_set_anchor(GTK_WINDOW(window),
+                         GTK_LAYER_SHELL_EDGE_RIGHT, TRUE);
+
+    /* Monitor selection */
+    if (argc > 1) {
+        int id = get_monitor_id(argv[1]);
+        if (id >= 0) {
+            GdkDisplay *display = gdk_display_get_default();
+            GdkMonitor *monitor =
+                gdk_display_get_monitor(display, id);
+            if (monitor)
+                gtk_layer_set_monitor(GTK_WINDOW(window), monitor);
+        }
+    }
+
+    GtkWidget *overlay = gtk_overlay_new();
+    gtk_container_add(GTK_CONTAINER(window), overlay);
+
+    char *resource = get_resource_path();
+
+    if (resource) {
+        GtkWidget *image = gtk_image_new_from_file(resource);
+        gtk_widget_set_hexpand(image, TRUE);
+        gtk_widget_set_vexpand(image, TRUE);
+        gtk_overlay_add_overlay(GTK_OVERLAY(overlay), image);
+    } else {
+        GtkCssProvider *css = gtk_css_provider_new();
+        gtk_css_provider_load_from_data(
+            css,
+            "window { background-color: black; }",
+            -1,
+            NULL
+        );
+
+        gtk_style_context_add_provider_for_screen(
+            gdk_screen_get_default(),
+            GTK_STYLE_PROVIDER(css),
+            GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
+        );
+    }
+
+    gtk_widget_show_all(window);
+    gtk_main();
+    return 0;
+}