diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index c51cd6b31f..46c40b6c99 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -35,6 +35,7 @@
  - [Thibault Nocchi](https://github.com/ThibaultNocchi)
  - [MrTimscampi](https://github.com/MrTimscampi)
  - [Sarab Singh](https://github.com/sarab97)
+ - [GuilhermeHideki](https://github.com/GuilhermeHideki)
  - [Andrei Oanca](https://github.com/OancaAndrei)
  - [Cromefire_](https://github.com/cromefire)
 
diff --git a/src/styles/_mixins.scss b/src/styles/_mixins.scss
new file mode 100644
index 0000000000..ed23ab0833
--- /dev/null
+++ b/src/styles/_mixins.scss
@@ -0,0 +1,23 @@
+@mixin background-cover($position) {
+    background-position: $position;
+    background-repeat: no-repeat;
+    background-size: cover;
+}
+
+@mixin circle($size) {
+    @include square($size);
+    border-radius: 100%;
+}
+
+@mixin position($position, $top: null, $right: null, $bottom: null, $left: null) {
+    position: $position;
+    top: $top;
+    right: $right;
+    bottom: $bottom;
+    left: $left;
+}
+
+@mixin square($size) {
+    height: $size;
+    width: $size;
+}