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diff --git a/spaghetti-monster/momentary/momentary.c b/spaghetti-monster/momentary/momentary.c
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+++ b/spaghetti-monster/momentary/momentary.c
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+/*
+ * Momentary: Very simple example UI for SpaghettiMonster.
+ * Is intended to be the simplest possible FSM e-switch UI.
+ * The light is on while the button is held; off otherwise.
+ *
+ * Copyright (C) 2017 Selene ToyKeeper
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define FSM_EMISAR_D4_DRIVER
+#define USE_LVP
+#define USE_DEBUG_BLINK
+#define USE_DELAY_4MS
+#include "spaghetti-monster.h"
+
+volatile uint8_t brightness;
+volatile uint8_t on_now;
+
+void light_on() {
+    on_now = 1;
+    PWM1_LVL = brightness;
+    PWM2_LVL = 0;
+}
+
+void light_off() {
+    on_now = 0;
+    PWM1_LVL = 0;
+    PWM2_LVL = 0;
+}
+
+uint8_t momentary_state(EventPtr event, uint16_t arg) {
+
+    if (event == EV_click1_press) {
+        brightness = 255;
+        light_on();
+        empty_event_sequence();  // don't attempt to parse multiple clicks
+        return 0;
+    }
+
+    else if (event == EV_release) {
+        light_off();
+        empty_event_sequence();  // don't attempt to parse multiple clicks
+        standby_mode();  // sleep while light is off
+        return 0;
+    }
+
+    return 1;  // event not handled
+}
+
+// LVP / low-voltage protection
+void low_voltage() {
+    if (brightness > 0) {
+        debug_blink(3);
+        brightness >>= 1;
+        if (on_now) light_on();
+    } else {
+        debug_blink(8);
+        light_off();
+        standby_mode();
+    }
+}
+
+void setup() {
+    debug_blink(2);
+    push_state(momentary_state, 0);
+}
+
+void loop() { }
+