Update README.md

README.md

@@ -1 +1,46 @@
 # progress
+
+## Progress Bar
+
+```cpp
+#include <progress/bar.hpp>
+
+int main() {
+  ProgressBar bar;
+
+  // Configure progress bar
+  bar.bar_width(50);
+  bar.start_with("[");
+  bar.fill_progress_with("■");
+  bar.lead_progress_with("■");
+  bar.fill_remainder_with("-");
+  bar.end_with("]");
+
+  // As configured, the bar will look like this:
+  // 
+  // [■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■-------------] 70%
+  //
+  //
+
+  auto job = [&bar]() {
+	       while(true) {
+		 if (bar.completed())
+		   break;
+		 bar.tick();
+		 std::this_thread::sleep_for(std::chrono::milliseconds(100));
+	       }   
+	     };
+
+  std::thread first_thread(job);
+  std::thread second_thread(job);
+  std::thread third_thread(job);
+  std::thread last_thread(job);
+
+  first_thread.join();
+  second_thread.join();
+  third_thread.join();
+  last_thread.join();
+
+  return 0;
+}
+```