diff --git a/modules/Grid/Grid.cpp b/modules/Grid/Grid.cpp
index 283686c..b7275e0 100644
--- a/modules/Grid/Grid.cpp
+++ b/modules/Grid/Grid.cpp
@@ -11,7 +11,7 @@ const std::string white {"#FFFFFF"};
 const std::string sand {"#B69061"};
 const std::string pastel_green {"#B1D1AF"};
 
-struct Rect {
+struct Square {
     double cx {0};
     double cy {0};
     double width {0};
@@ -19,7 +19,7 @@ struct Rect {
 };
 
 struct Situation {
-    std::vector<Rect> rects;
+    std::vector<Square> rects;
     Color bg {pastel_green};
 };
 
@@ -79,7 +79,7 @@ void Grid::setup(cairo_t* context, const cairo_rectangle_t& rect) {
     double v_margin = (inset.height - (_v - 1) * _d) / 2;
     for (size_t x = 0; x < _h; ++x) {
         for (size_t y = 0; y < _v; ++y) {
-            Rect r;
+            Square r;
             r.cx = _border + h_margin + x * _d;
             r.cy = _border + v_margin + y * _d;
             r.width = 0;
@@ -126,7 +126,7 @@ void Grid::update() {
             if (++_frames > _fade * fps()) {
                 _frames = 0;
                 _old = _new;
-                for (Rect& r : _new.rects) {
+                for (Square& r : _new.rects) {
                     r.width = random_between(_min_size, _max_size);
                     r.color = sc::random::choice(_colors);
                 }
@@ -147,7 +147,7 @@ void Grid::render() {
         cairo_set_source_rgb(_c, bg.r, bg.g, bg.b);
         cairo_rectangle(_c, _r.x, _r.y, _r.width, _r.height);
         cairo_fill(_c);
-        for (const Rect& r : _cur.rects) {
+        for (const Square& r : _cur.rects) {
             RGB col {RGB(r.color)};
             cairo_set_source_rgb(_c, col.r, col.g, col.b);
             cairo_rectangle(_c, r.cx - r.width / 2, r.cy - r.width / 2, r.width, r.width);
@@ -165,9 +165,9 @@ void Grid::animate() {
         _cur.bg = bg3;
     }
     for (size_t i = 0; i < _old.rects.size(); ++i) {
-        Rect& r1 = _old.rects[i];
-        Rect& r2 = _new.rects[i];
-        Rect& r3 = _cur.rects[i];
+        Square& r1 = _old.rects[i];
+        Square& r2 = _new.rects[i];
+        Square& r3 = _cur.rects[i];
         RGB rgb1 {RGB(r1.color)};
         RGB rgb2 {RGB(r2.color)};
         RGB rgb3 {rgb1.r + f * (rgb2.r - rgb1.r), rgb1.g + f * (rgb2.g - rgb1.g), rgb1.b + f * (rgb2.b - rgb1.b)};