diff --git a/block.cpp b/block.cpp
index 2ee62dd..5ef9ee1 100644
--- a/block.cpp
+++ b/block.cpp
@@ -1,6 +1,14 @@
 #include "block.hpp"
 
 void Block::draw(sf::RenderWindow& window) {
+    if (charge > 0) {
+        shape.setFillColor(sf::Color(0, 0, 255));
+    } else if (charge < 0) {
+        shape.setFillColor(sf::Color(255, 0, 0));
+    } else {
+        shape.setFillColor(sf::Color(0, 0, 0));
+    }
+
     shape.setPosition(position);
     window.draw(shape);
 }