config.yml

Christmas:
  Delay: 50
  Colors:
   - White
   - Red
   - Green

Halloween:
  Delay: 20
  Colors:
   - Black
   - Orange

StPatricks:
  Delay: 80
  Colors:
   - Green
   - Yellow

LightBlockType.java

package me.exerosis.example.lights;

import com.google.common.collect.Iterators;
import org.apache.commons.lang.WordUtils;
import org.bukkit.Bukkit;
import org.bukkit.DyeColor;
import org.bukkit.block.Block;
import org.bukkit.block.BlockState;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.*;
import org.bukkit.event.entity.EntityChangeBlockEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.material.Dye;
import org.bukkit.plugin.Plugin;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import static org.bukkit.Material.AIR;
import static org.bukkit.Material.WOOL;

public class LightBlockType implements Listener, Runnable {
	private final List<Block> blocks = new ArrayList<>();
	private final String name;
	private final Iterator<DyeColor> colors;
	private final ItemStack item = new ItemStack(WOOL);
	
	public LightBlockType(Plugin plugin, String name, long delay, DyeColor... colors) {
		this.name = name;
		this.colors = Iterators.cycle(colors);
		
		//--Setup Item--
		final ItemMeta meta = item.getItemMeta();
		meta.setDisplayName("Light Block");
		final List<String> lore = new ArrayList<>();
		lore.add("Name: " + name);
		lore.add("Delay: " + delay);
		lore.add("Colors: ");
		for (DyeColor color : colors)
			lore.add(" - " + WordUtils.capitalizeFully(color.name().replace('_', ' ').toLowerCase()));
		meta.setLore(lore);
		
		//--Start Tasks--
		Bukkit.getPluginManager().registerEvents(this, plugin);
		Bukkit.getScheduler().runTaskTimer(plugin, this, delay, delay);
	}
	
	public String getName() {
		return name;
	}
	
	public ItemStack getItem() {
		return item;
	}
	
	public List<Block> getBlocks() {
		return blocks;
	}
	
	@Override
	public void run() {
		final DyeColor currentColor = colors.next();
		for (Block block : blocks) {
			final BlockState state = block.getState();
			((Dye) state.getData()).setColor(currentColor);
			state.update();
		}
	}
	
	@EventHandler
	void onPlace(BlockPlaceEvent event) {
		if (item.isSimilar(event.getItemInHand()))
			blocks.add(event.getBlock());
	}
	
	//TODO IDK if these are all required(there might even be others) but some testing would fix that.
	@EventHandler
	void onDestroy(BlockBreakEvent event) {
		blocks.remove(event.getBlock());
	}
	
	@EventHandler
	void onExplode(BlockExplodeEvent event) {
		blocks.remove(event.getBlock());
	}
	
	@EventHandler
	void onBurn(BlockBurnEvent event) {
		blocks.remove(event.getBlock());
	}
	
	@EventHandler
	void onExtend(BlockPistonExtendEvent event) {
		for (Block block : event.getBlocks())
			if (blocks.remove(block))
				blocks.add(block.getRelative(event.getDirection()));
	}
	
	@EventHandler
	void onRetract(BlockPistonRetractEvent event) {
		for (Block block : event.getBlocks())
			if (blocks.remove(block))
				blocks.add(block.getRelative(event.getDirection()));
	}
	
	@EventHandler
	void onChange(EntityChangeBlockEvent event) {
		if (event.getTo() == AIR)
			blocks.remove(event.getBlock());
	}
}

Main.java

package me.exerosis.example.lights;

import org.bukkit.Bukkit;
import org.bukkit.DyeColor;
import org.bukkit.Location;
import org.bukkit.block.Block;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.InventoryHolder;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class Main extends JavaPlugin implements Listener, InventoryHolder {
	private static final String CMD_MENU = "lightblocks";
	private static final String KEY_DELAY = "Delay";
	private static final String KEY_COLORS = "Colors";
	private static final String KEY_BLOCKS = "Blocks";
	private final List<LightBlockType> lightTypes = new ArrayList<>();
	private final Inventory menu = Bukkit.createInventory(this, 45, "Light Block Types");
	
	
	@Override
	public void onEnable() {
		saveDefaultConfig();
		Bukkit.getPluginManager().registerEvents(this, this);
		getCommand(CMD_MENU).setExecutor(this);
		
		final Map<String, Object> values = getConfig().getValues(true);
		for (Map.Entry<String, Object> entry : values.entrySet()) {
			final String name = entry.getKey();
			final Map<String, Object> type = (Map<String, Object>) entry.getValue();
			final long delay = (long) type.getOrDefault(KEY_DELAY, 0L);
			final List<String> colorNames = (List<String>) type.getOrDefault(KEY_COLORS, new ArrayList<>(0));
			final DyeColor[] colors = new DyeColor[colorNames.size()];
			for (int i = 0; i < colors.length; i++)
				colors[i] = DyeColor.valueOf(colorNames.get(i).toUpperCase().replace(' ', '_'));
			
			final LightBlockType lightType = new LightBlockType(this, name, delay, colors);
			
			final List<Location> locations = (List<Location>) type.getOrDefault(KEY_BLOCKS, new ArrayList<>(0));
			for (Location location : locations)
				lightType.getBlocks().add(location.getBlock());
			
			lightTypes.add(lightType);
		}
	}
	
	@EventHandler
	void onClick(InventoryClickEvent event) {
		if (event.getClickedInventory().getHolder() != this)
			return;
		event.getView().getBottomInventory().addItem(event.getCurrentItem());
		event.setCancelled(true);
	}
	
	@Override
	public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
		if (sender instanceof Player && sender.isOp())
			((Player) sender).openInventory(menu);
		return true;
	}
	
	@Override
	public void onDisable() {
		for (LightBlockType lightType : lightTypes) {
			final List<Location> locations = new ArrayList<>();
			for (Block block : lightType.getBlocks())
				locations.add(block.getLocation());
			getConfig().set(lightType.getName() + "." + KEY_BLOCKS, locations);
		}
		saveConfig();
	}
	
	@Override
	public Inventory getInventory() {
		return menu;
	}
}