# LEDs/Heatmap/Heatmap.ino
``` c++
,/* -*- mode: c++ -*-
 * Kaleidoscope-Heatmap -- Heatmap LED effect for Kaleidoscope.
 * Copyright (C) 2016, 2017, 2018  Gergely Nagy
 *
 * 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/>.
 */

#include <Kaleidoscope.h>
#include <Kaleidoscope-LEDControl.h>
#include <Kaleidoscope-Heatmap.h>

// clang-format off
KEYMAPS(
  [0] = KEYMAP_STACKED
  (Key_LEDEffectNext, Key_1, Key_2, Key_3, Key_4, Key_5, Key_LEDEffectNext,
   Key_Backtick,      Key_Q, Key_W, Key_E, Key_R, Key_T, Key_Tab,
   Key_PageUp,        Key_A, Key_S, Key_D, Key_F, Key_G,
   Key_PageDown,      Key_Z, Key_X, Key_C, Key_V, Key_B, Key_Escape,

   Key_LeftControl, Key_Backspace, Key_LeftGui, Key_LeftShift,
   Key_NoKey,

   Key_skip,  Key_6, Key_7, Key_8,     Key_9,      Key_0,         Key_skip,
   Key_Enter, Key_Y, Key_U, Key_I,     Key_O,      Key_P,         Key_Equals,
              Key_H, Key_J, Key_K,     Key_L,      Key_Semicolon, Key_Quote,
   Key_skip,  Key_N, Key_M, Key_Comma, Key_Period, Key_Slash,     Key_Minus,

   Key_RightShift, Key_RightAlt, Key_Spacebar, Key_RightControl,
   Key_NoKey),
)
// clang-format on

KALEIDOSCOPE_INIT_PLUGINS(LEDControl,
                          HeatmapEffect);

void setup() {
  Kaleidoscope.setup();

  HeatmapEffect.activate();
}

void loop() {
  Kaleidoscope.loop();
}

```