diff --git a/firmware/user/main.c b/firmware/user/main.c
index 443ac59..e11d838 100644
--- a/firmware/user/main.c
+++ b/firmware/user/main.c
@@ -145,7 +145,7 @@ int main(void)
 
         // after sending LEDs, run our program
         // to update the LED buffer for next time
-        if ((ticnt & 0x3) == 0) {
+        if ((ticnt & 0x7) == 0) {
             ui_render();
         }
     }
diff --git a/firmware/user/src/adc.c b/firmware/user/src/adc.c
index a287a7f..3289109 100644
--- a/firmware/user/src/adc.c
+++ b/firmware/user/src/adc.c
@@ -62,6 +62,12 @@ void adc_read()
 void adc_set_mode_lsens(uint8_t mode)
 {
     lsens_mode = mode;
+
+    if (mode == LSENS_OUTPUT) {
+        lsens_gpio.GPIO_Pin = LSENS_A_PIN | LSENS_K_PIN;
+        lsens_gpio.GPIO_Mode = GPIO_Mode_Out_PP;
+        GPIO_Init(LSENS_PORT, &lsens_gpio);
+    }
 }
 
 uint8_t adc_get_mode_lsens()
@@ -79,7 +85,7 @@ static void lsens_start()
     // set cathode high, let it charge
     LSENS_PORT->BSHR = LSENS_K_PIN;
 
-    // set anode floating
+    // set anode low
     lsens_gpio.GPIO_Pin = LSENS_A_PIN;
     lsens_gpio.GPIO_Mode = GPIO_Mode_IPD;
     GPIO_Init(LSENS_PORT, &lsens_gpio);
diff --git a/firmware/user/src/config.c b/firmware/user/src/config.c
index b66d48d..2ba585f 100644
--- a/firmware/user/src/config.c
+++ b/firmware/user/src/config.c
@@ -130,12 +130,12 @@ void userconf_load()
 
         // program 0: flashing
         userconf.pep_conf[0][0] = 0x80;     // brightness
-        userconf.pep_conf[0][1] = 200;      // flash rate
+        userconf.pep_conf[0][1] = 100;      // flash rate
 
         // program 2: loops
         userconf.pep_conf[2][0] = 0xc0;     // brightness
-        userconf.pep_conf[2][1] = 0;        // looping rate
-        userconf.pep_conf[2][3] = 1;        // decay rate
+        userconf.pep_conf[2][1] = 1;        // looping rate
+        userconf.pep_conf[2][3] = 2;        // decay rate
 
         // program 4: alternating
         userconf.pep_conf[4][0] = 0x80;     // brightness
diff --git a/firmware/user/src/ledprog_pep.c b/firmware/user/src/ledprog_pep.c
index b9988c1..742a241 100644
--- a/firmware/user/src/ledprog_pep.c
+++ b/firmware/user/src/ledprog_pep.c
@@ -4,6 +4,9 @@
 
 #include <stdint.h>
 
+#include "ledprog_pep.h"
+
+#include "adc.h"
 #include "config.h"
 #include "led.h"
 #include "lis2dw.h"
@@ -21,6 +24,9 @@ enum {
 static uint16_t pep_rnd;
 static uint8_t pep_work[4];
 
+static uint16_t rand_program = 0;
+static uint32_t rand_timeout = 0;
+static uint16_t rand_flash_timeout;
 
 
 /*
@@ -162,10 +168,11 @@ static void pep_2_loops(uint8_t tick)
     } else {
         pep_work[0] = rate;
         pep_work[1]++;
+        pep_work[1] &= 0x3f;
     }
 
     bot = pep_work[1] * LED_PEP_COUNT;
-    bot >>= 8;
+    bot >>= 6;
 
     for (i = 0; i < LED_PEP_COUNT; i++) {
         if (i == bot)        led.section.pep[i] = brite;
@@ -176,7 +183,7 @@ static void pep_2_loops(uint8_t tick)
     }
 
     top = pep_work[1] * LED_HAT_COUNT;
-    top >>= 8;
+    top >>= 6;
 
     for (i = 0; i < LED_HAT_COUNT; i++) {
         if (i == top)        led.section.hat[i] = brite;
@@ -213,7 +220,7 @@ static void pep_3_neon_sign(uint8_t tick)
             target = rnd & 1;
 
             flicker_count[target] = prng_scale16(1, 4) << 1;
-            flicker_delay[target] = prng_scale16(12, 240);
+            flicker_delay[target] = prng_scale16(6, 120);
 
             if (rnd & 2) {
                 flicker_count[target ^ 1] = flicker_count[target];
@@ -392,6 +399,38 @@ static void pep_5_nom(uint8_t tick)
     }
 }
 
+static void pep_6_random(uint8_t tick)
+{
+    if (rand_flash_timeout <= 2) {
+        // light lsens
+        adc_set_mode_lsens(LSENS_OUTPUT);
+        LSENS_PORT->BSHR = LSENS_A_PIN;
+        LSENS_PORT->BCR  = LSENS_K_PIN;
+        if (!rand_flash_timeout) rand_flash_timeout = 600;
+    } else {
+        if (adc_get_mode_lsens() == LSENS_OUTPUT) {
+            // restore lsens
+            LSENS_PORT->BCR = LSENS_A_PIN;
+            adc_set_mode_lsens(LSENS_READING_IDLE);
+        }
+    }
+
+    rand_flash_timeout--;
+
+    if (!rand_timeout) {
+        rand_timeout = prng_scale16(20, 150);
+        rand_timeout <<= 7;
+
+        rand_program = 6 * prng_get8();
+        rand_program >>= 8;
+
+        ledprog_pep_init();
+    }
+
+    rand_timeout--;
+    ledprog_pep[rand_program](tick);
+}
+
 /*
  * make a sharp point at whatever direction is the ground
  * note: probably won't be done before con
@@ -432,8 +471,9 @@ void (*ledprog_pep[8])(uint8_t) = {
     pep_3_neon_sign,
     pep_4_alternate,
     pep_5_nom,
-    pep_6_accelerometer,
-    pep_7_heat
+    pep_6_random
+    //pep_6_accelerometer,
+    //pep_7_heat
 };
 
 
@@ -460,5 +500,9 @@ void ledprog_pep_init()
     // per-program initialization
     nom_timeout = 0;
 
+    if ((userconf.pep_prog_ena_map & ~0x80) != 6) {
+        rand_flash_timeout = 3;
+    }
+
     // there is none on this badge
 }
diff --git a/firmware/user/src/ui.c b/firmware/user/src/ui.c
index 026012a..1360c36 100644
--- a/firmware/user/src/ui.c
+++ b/firmware/user/src/ui.c
@@ -19,12 +19,12 @@
 #define MODE_PROGRAM            1
 #define MODE_PARAMETER          2
 
-#define UI_CONF_SAVE_TIMEOUT    512
+#define UI_CONF_SAVE_TIMEOUT    384
 
 #define UI_PROG_RUNTIME_MIN     (128*15)    // 15 seconds
 #define UI_PROG_RUNTIME_MAX     (128*120)   // 120 seconds
 
-#define PROG_REPEAT             0x80
+#define PROG_RANDOM             0x80
 
 
 
@@ -51,16 +51,18 @@ void ui_btn_push_cb(uint8_t idx)
 
 void ui_btn_hold_cb(uint8_t idx)
 {
+    /*
     switch (idx) {
         case 0: {   // left pepper hat
-            userconf.pep_prog_ena_map ^= PROG_REPEAT;
+            userconf.pep_prog_ena_map ^= PROG_RANDOM;
             break;
         }
         case 1: {   // right pepper hat
-            userconf.rgb_prog_ena_map ^= PROG_REPEAT;
+            userconf.rgb_prog_ena_map ^= PROG_RANDOM;
             break;
         }
     }
+    */
 }
 
 void ui_btn_release_cb(uint8_t idx)
@@ -69,18 +71,18 @@ void ui_btn_release_cb(uint8_t idx)
 
     switch (idx) {
         case 0: {   // left pepper hat
-            update = userconf.pep_prog_ena_map & ~(PROG_REPEAT);
+            update = userconf.pep_prog_ena_map & ~(PROG_RANDOM);
             update++;
-            if (update > 5) update = 0;
-            userconf.pep_prog_ena_map = update | (userconf.pep_prog_ena_map & PROG_REPEAT);
+            if (update > 6) update = 0;
+            userconf.pep_prog_ena_map = update | (userconf.pep_prog_ena_map & PROG_RANDOM);
             ledprog_pep_init();
             break;
         }
         case 1: {   // right pepper hat
-            update = userconf.rgb_prog_ena_map & ~(PROG_REPEAT);
+            update = userconf.rgb_prog_ena_map & ~(PROG_RANDOM);
             update++;
             if (update > 3) update = 0;
-            userconf.rgb_prog_ena_map = update | (userconf.rgb_prog_ena_map & PROG_REPEAT);
+            userconf.rgb_prog_ena_map = update | (userconf.rgb_prog_ena_map & PROG_RANDOM);
             ledprog_rgb_init();
             break;
         }
@@ -113,8 +115,8 @@ void ui_render()
 
     tick++;
 
-    uint8_t prog_pep_idx = userconf.pep_prog_ena_map & ~(PROG_REPEAT);
-    uint8_t prog_rgb_idx = userconf.rgb_prog_ena_map & ~(PROG_REPEAT);
+    uint8_t prog_pep_idx = userconf.pep_prog_ena_map & ~(PROG_RANDOM);
+    uint8_t prog_rgb_idx = userconf.rgb_prog_ena_map & ~(PROG_RANDOM);
 
     switch (mode) {
         case MODE_RUN: {