Well that was easy

Makefile

@@ -0,0 +1,12 @@
+CC := gcc
+CFLAGS := $(shell pkg-config --cflags gtk+-3.0)
+LIBS := $(shell pkg-config --libs gtk+-3.0)
+TARGET := loadspinner
+
+all: $(TARGET)
+
+$(TARGET): spinner.c
+	$(CC) -o $@ $< $(CFLAGS) $(LIBS)
+
+clean:
+	rm -f $(TARGET)

spinner.c

@@ -0,0 +1,94 @@
+#include <gtk/gtk.h>
+#include <string.h>
+
+gboolean on_timeout(gpointer data) {
+  gtk_widget_queue_draw(GTK_WIDGET(data));
+  return G_SOURCE_CONTINUE;
+}
+
+gboolean on_draw(GtkWidget *widget, cairo_t *cr, gpointer data) {
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context(widget);
+  gtk_render_background(context, cr, 0, 0, gtk_widget_get_allocated_width(widget), gtk_widget_get_allocated_height(widget));
+
+  return FALSE;
+}
+
+void show_help() {
+  g_print("Usage: loadspinner [TEXT] [FONTSIZE]\n");
+  g_print("TEXT: The text to display in the label.\n");
+  g_print("FONTSIZE: The font size of the label.\n");
+}
+
+int main(int argc, char *argv[]) {
+  if (argc == 2 && strcmp(argv[1], "--help") == 0) {
+    show_help();
+    return 0;
+  }
+
+  if (argc != 3) {
+    g_print("Error: Invalid number of arguments.\n");
+    g_print("Use './program_name --help' for usage information.\n");
+    return 1;
+  }
+
+  GtkWidget *window;
+  GtkWidget *spinner;
+  GtkWidget *label;
+  GtkWidget *box;
+  guint timeout_id;
+
+  gtk_init(&argc, &argv);
+
+  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+  gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
+  gtk_window_set_skip_taskbar_hint(GTK_WINDOW(window), TRUE);
+  gtk_window_set_skip_pager_hint(GTK_WINDOW(window), TRUE);
+  gtk_window_set_default_size(GTK_WINDOW(window), 300, 200); // Set the desired size of the window
+
+  GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
+  GdkVisual *visual = gdk_screen_get_rgba_visual(screen);
+  if (visual != NULL) {
+    gtk_widget_set_visual(window, visual);
+    gtk_widget_set_app_paintable(window, TRUE);
+  }
+
+  g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
+  g_signal_connect(G_OBJECT(window), "draw", G_CALLBACK(on_draw), NULL);
+
+  box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 10);
+  gtk_container_set_border_width(GTK_CONTAINER(box), 20);
+
+  spinner = gtk_spinner_new();
+  gtk_widget_set_size_request(spinner, 100, 100); // Set the size of the spinner widget
+  gtk_widget_set_halign(spinner, GTK_ALIGN_CENTER);
+  gtk_widget_set_valign(spinner, GTK_ALIGN_CENTER);
+  gtk_spinner_start(GTK_SPINNER(spinner));
+  gtk_box_pack_start(GTK_BOX(box), spinner, TRUE, TRUE, 0);
+
+  // Extract the arguments for the label and font size
+  char *loginText = argv[1];
+  int fontSize = atoi(argv[2]);
+
+  label = gtk_label_new(loginText);
+  PangoFontDescription *font_desc = pango_font_description_new(); // Create a new font description object
+  pango_font_description_set_family(font_desc, "Sans"); // Set the font family
+  pango_font_description_set_size(font_desc, fontSize * PANGO_SCALE); // Set the font size
+  gtk_widget_override_font(label, font_desc);
+  gtk_widget_set_halign(label, GTK_ALIGN_CENTER);
+  gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
+  gtk_box_pack_start(GTK_BOX(box), label, TRUE, TRUE, 0);
+
+  gtk_container_add(GTK_CONTAINER(window), box);
+  gtk_widget_show_all(window);
+
+  timeout_id = g_timeout_add(1000, on_timeout, window);
+
+  gtk_main();
+
+  g_source_remove(timeout_id);
+
+  return 0;
+}
+