Fully working program

main.py

@@ -0,0 +1,46 @@
+from math import ceil
+import locate2
+
+def crible(max):
+    result = [i for i in range(2, max) if i%2 and i%5]
+    step = 0
+    while step != len(result):
+        div = result[step]
+        if div**2 > result[-1]:
+            break
+        result = [i for i in result if i%div or i==div]
+        step += 1
+    #insert 2 & 5 if needed
+    if max > 2:
+        result.insert(0, 2)
+    if max > 5:
+        result.insert(2, 5)
+    return result
+
+#list browser
+def explore(provided_list):
+    scr = locate2.Screen(21, 7) #app screen, w:21 h:7
+    pos = 0
+    max_pos = ceil(len(provided_list) / 7) - 1
+    key = " "
+    while key != "0":
+        scr.fill()
+        scr.locate_v(21, 1, "^4||1v") #sidebar
+        status = "{}/{}".format(pos, max_pos)
+        scr.locate(20 - len(status), 1, status)
+        for i in range(7):
+            try:
+                scr.locate(1, i+1, provided_list[pos*7+i])
+            except:
+                break
+        uin = scr.refresh(fancy=True)[-1:] #only keep the last char entered
+        key = uin if uin else key
+        power = 10 ** "123".find(key)
+        if power != 0.1 and pos + power <= max_pos:
+            pos += power
+        power = 10 ** "456".find(key)
+        if power != 0.1 and pos - power >= 0:
+            pos -= power
+
+result = crible(int(input("max>")))
+explore(result)