Add project files.

Testthings/Program.cs

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+using System;
+using System.Diagnostics;
+
+namespace Testthings
+{
+    class Program
+    {
+
+        static int countNum = 0;
+
+        static void Main(string[] args)
+        {
+            var x = 0.0001;
+            for (int i = 0; i < 360; i++)
+            {
+                x = x + .017453292519;
+                var y = Math.Sin(x) * 250;
+                Debug.WriteLine($"pos [{i}] x={x}, y={y}");
+            }
+            
+           //Console.WriteLine($"testar scaling {445} -> {scaleStep(445, 8)}");
+        }
+
+
+
+        private static long scaleStep(decimal maxValue, int maxSteps)
+        {
+            long stepValue = nextValue(true);
+            long tmpValue = stepValue;
+            int _maxSteps = (int)((int) maxValue/stepValue);
+            while (_maxSteps > maxSteps)
+            {
+                stepValue = tmpValue * nextValue();
+                _maxSteps = (int)((int)maxValue / stepValue);
+                tmpValue = stepValue == tmpValue * 10 ? stepValue : tmpValue;
+            }
+            return stepValue;
+        }
+
+        private static int nextValue(bool first=false)
+        {
+            if (first)
+            {
+                countNum = 1;
+            }
+            else
+            {
+                switch (countNum)
+                {
+                    case 1:
+                        {
+                            countNum = 2;
+                            break;
+                        }
+                    case 2:
+                        {
+                            countNum = 5;
+                            break;
+                        }
+                    case 5:
+                        {
+                            countNum = 10;
+                            break;
+                        }
+                    case 10:
+                        {
+                            countNum = 2;
+                            break;
+                        }
+                }
+            }
+            return countNum;
+        }
+    }
+}

Testthings/Testthings.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>