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diff --git a/Marlin/src/feature/leds/printer_event_leds.cpp b/Marlin/src/feature/leds/printer_event_leds.cpp
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * feature/leds/printer_event_leds.cpp - LED color changing based on printer status
+ */
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(PRINTER_EVENT_LEDS)
+
+#include "printer_event_leds.h"
+
+PrinterEventLEDs printerEventLEDs;
+
+#if HAS_LEDS_OFF_FLAG
+  bool PrinterEventLEDs::leds_off_after_print; // = false
+#endif
+
+#if HAS_TEMP_HOTEND || HAS_HEATED_BED
+
+  uint8_t PrinterEventLEDs::old_intensity = 0;
+
+  inline uint8_t pel_intensity(const float &start, const float &current, const float &target) {
+    if (uint16_t(start) == uint16_t(target)) return 255;
+    return (uint8_t)map(constrain(current, start, target), start, target, 0.f, 255.f);
+  }
+
+  inline void pel_set_rgb(const uint8_t r, const uint8_t g, const uint8_t b) {
+    leds.set_color(
+      MakeLEDColor(r, g, b, 0, neo.brightness())
+      #if ENABLED(NEOPIXEL_IS_SEQUENTIAL)
+        , true
+      #endif
+    );
+  }
+
+#endif
+
+#if HAS_TEMP_HOTEND
+
+  void PrinterEventLEDs::onHotendHeating(const float &start, const float &current, const float &target) {
+    const uint8_t blue = pel_intensity(start, current, target);
+    if (blue != old_intensity) {
+      old_intensity = blue;
+      pel_set_rgb(255, 0, 255 - blue);
+    }
+  }
+
+#endif
+
+#if HAS_HEATED_BED
+
+  void PrinterEventLEDs::onBedHeating(const float &start, const float &current, const float &target) {
+    const uint8_t red = pel_intensity(start, current, target);
+    if (red != old_intensity) {
+      old_intensity = red;
+      pel_set_rgb(red, 0, 255);
+    }
+  }
+#endif
+
+#endif // PRINTER_EVENT_LEDS