big refactor: i see i need header files

src/engineAnimation.c

@@ -0,0 +1,17 @@
+#include "engine.h"
+
+void UpdateAnimation(Animation *animation, float deltaTime) {
+    animation->animTimer += deltaTime;
+    float frameTime = 1.0f / animation->framesSpeed;
+
+    if (animation->animTimer < frameTime) {
+        return;
+    }
+
+    animation->animTimer -= frameTime;
+    animation->currentFrame++;
+
+    if (animation->currentFrame >= animation->maxFrame) {
+        animation->currentFrame = 0;
+    }
+}