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diff --git a/users/byungyoonc/saturated_solid_multisplash.h b/users/byungyoonc/saturated_solid_multisplash.h
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+++ b/users/byungyoonc/saturated_solid_multisplash.h
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+/* Copyright 2021 Choi Byungyoon <byungyoonc@gmail.com>
+ *
+ * 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 2 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/>.
+ */
+
+#if defined(RGB_MATRIX_KEYPRESSES)
+RGB_MATRIX_EFFECT(saturated_solid_multisplash)
+
+#   if defined(RGB_MATRIX_CUSTOM_EFFECT_IMPLS)
+
+static bool saturated_solid_multisplash(effect_params_t* params) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    uint8_t count = g_last_hit_tracker.count;
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+        HSV hsv = rgb_matrix_config.hsv;
+        hsv.v   = 0;
+        for (uint8_t j = 0; j < count; j++) {
+            int16_t  dx   = g_led_config.point[i].x - g_last_hit_tracker.x[j];
+            int16_t  dy   = g_led_config.point[i].y - g_last_hit_tracker.y[j];
+            uint8_t  dist = sqrt16(dx * dx + dy * dy);
+            uint16_t tick = scale16by8(g_last_hit_tracker.tick[j], qadd8(rgb_matrix_config.speed, 1));
+
+            uint16_t effect = tick - dist;
+            if (effect > 255) effect = 255;
+            uint16_t vdiff = scale16by8(255 - effect, 255 - dist);
+            hsv.v = qadd8(hsv.v, vdiff);
+            hsv.s = qsub8(hsv.s, qsub8(127, effect));
+        }
+        hsv.v   = scale8(hsv.v, rgb_matrix_config.hsv.v);
+        RGB rgb = rgb_matrix_hsv_to_rgb(hsv);
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+    return led_max < DRIVER_LED_TOTAL;
+}
+
+#   endif   // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+#endif      // RGB_MATRIX_KEYPRESSES