Initial commit

.gitignore

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+/.vs
+/bin
+/obj

Matrix.cs

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+namespace Matrix
+{
+    public class Matrix
+    {
+        private Random random;
+        private List<int> lengths;
+
+        public Matrix()
+        {
+            random = new();
+            SetLengths();
+            Console.ForegroundColor = ConsoleColor.Green;
+            Console.BackgroundColor = ConsoleColor.Black;
+        }
+
+        void SetLengths()
+        {
+            List<int> newLengths = [];
+            for (int i = 0; i < Console.WindowWidth; i++)
+            {
+                newLengths.Add(random.Next(0, Console.WindowHeight));
+            }
+            lengths = newLengths;
+        }
+
+        string GetRow(int row)
+        {
+            string curRow = "";
+            for (int column = 0; column < lengths.Count; column++)
+            {
+                if (row < lengths[column])
+                {
+                    curRow += (char)random.Next(33, 127);
+                }
+                else
+                {
+                    curRow += ' ';
+                }
+            }
+            return curRow;
+        }
+
+        public void Start()
+        {
+            while (true)
+            {
+                for (int row = 0; row < lengths.Max(); row++)
+                {
+                    Console.WriteLine(GetRow(row));
+                    Thread.Sleep(50);
+                }
+                Console.SetCursorPosition(0, 0);
+                SetLengths();
+            }
+        }
+    }
+}

Matrix.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Matrix.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34701.34
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Matrix", "Matrix.csproj", "{CA49C33E-33DC-4C4F-92C3-8849CB3F3324}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{CA49C33E-33DC-4C4F-92C3-8849CB3F3324}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CA49C33E-33DC-4C4F-92C3-8849CB3F3324}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CA49C33E-33DC-4C4F-92C3-8849CB3F3324}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CA49C33E-33DC-4C4F-92C3-8849CB3F3324}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {82E7F969-8518-4940-BEA9-EE3DBA6C2023}
+	EndGlobalSection
+EndGlobal

Program.cs

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+namespace Matrix
+{
+    public class Program
+    {
+        static void Main()
+        {
+            Matrix matrix = new();
+            matrix.Start();
+        }
+    }
+}